Home / 687,445,863,408.50-948,632,546,643.55-378,779,949,174.25

Finding the Fourth Proportional to 687,445,863,408.50, 948,632,546,643.55 and 378,779,949,174.25

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Solution

The fourth proportional to 687,445,863,408.50, 948,632,546,643.55 and 378,779,949,174.25 is: 522,692,777,611.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,445,863,408.50 : 948,632,546,643.55 = 378,779,949,174.25 : x
  2. Step 2: Convert to fraction form
    687,445,863,408.50/948,632,546,643.55 = 378,779,949,174.25/x
  3. Step 3: Cross multiply
    687,445,863,408.50x = 948,632,546,643.55 × 378,779,949,174.25
  4. Step 4: Simplify right side
    687,445,863,408.50x = 359,322,987,802,683,225,669,632
  5. Step 5: Solve for x
    x = 359,322,987,802,683,225,669,632/687,445,863,408.50
  6. Step 6: Final answer
    x = 522,692,777,611.73

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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.