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Finding the Fourth Proportional to 681,307,925.76, 940,204,013.76 and 387,952,493.76

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Solution

The fourth proportional to 681,307,925.76, 940,204,013.76 and 387,952,493.76 is: 535,373,915.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,307,925.76 : 940,204,013.76 = 387,952,493.76 : x
  2. Step 2: Convert to fraction form
    681,307,925.76/940,204,013.76 = 387,952,493.76/x
  3. Step 3: Cross multiply
    681,307,925.76x = 940,204,013.76 × 387,952,493.76
  4. Step 4: Simplify right side
    681,307,925.76x = 364,754,491,781,353,344
  5. Step 5: Solve for x
    x = 364,754,491,781,353,344/681,307,925.76
  6. Step 6: Final answer
    x = 535,373,915.36

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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.