Home / 687,445,863,409.50-948,632,546,644.95-378,779,949,175.25

Finding the Fourth Proportional to 687,445,863,409.50, 948,632,546,644.95 and 378,779,949,175.25

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Solution

The fourth proportional to 687,445,863,409.50, 948,632,546,644.95 and 378,779,949,175.25 is: 522,692,777,613.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,445,863,409.50 : 948,632,546,644.95 = 378,779,949,175.25 : x
  2. Step 2: Convert to fraction form
    687,445,863,409.50/948,632,546,644.95 = 378,779,949,175.25/x
  3. Step 3: Cross multiply
    687,445,863,409.50x = 948,632,546,644.95 × 378,779,949,175.25
  4. Step 4: Simplify right side
    687,445,863,409.50x = 359,322,987,804,162,103,705,600
  5. Step 5: Solve for x
    x = 359,322,987,804,162,103,705,600/687,445,863,409.50
  6. Step 6: Final answer
    x = 522,692,777,613.12

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.