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Finding the Fourth Proportional to 681,437.76, 940,403.54 and 379,651.20

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Solution

The fourth proportional to 681,437.76, 940,403.54 and 379,651.20 is: 523,929.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,437.76 : 940,403.54 = 379,651.20 : x
  2. Step 2: Convert to fraction form
    681,437.76/940,403.54 = 379,651.20/x
  3. Step 3: Cross multiply
    681,437.76x = 940,403.54 × 379,651.20
  4. Step 4: Simplify right side
    681,437.76x = 357,025,332,445.25
  5. Step 5: Solve for x
    x = 357,025,332,445.25/681,437.76
  6. Step 6: Final answer
    x = 523,929.48

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1.5x scale

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.