Home / 687,445,863,413.13-948,632,546,649.96-378,779,949,178.88

Finding the Fourth Proportional to 687,445,863,413.13, 948,632,546,649.96 and 378,779,949,178.88

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Solution

The fourth proportional to 687,445,863,413.13, 948,632,546,649.96 and 378,779,949,178.88 is: 522,692,777,618.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,445,863,413.13 : 948,632,546,649.96 = 378,779,949,178.88 : x
  2. Step 2: Convert to fraction form
    687,445,863,413.13/948,632,546,649.96 = 378,779,949,178.88/x
  3. Step 3: Cross multiply
    687,445,863,413.13x = 948,632,546,649.96 × 378,779,949,178.88
  4. Step 4: Simplify right side
    687,445,863,413.13x = 359,322,987,809,503,365,300,224
  5. Step 5: Solve for x
    x = 359,322,987,809,503,365,300,224/687,445,863,413.13
  6. Step 6: Final answer
    x = 522,692,777,618.13

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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.