Home / 687,255,305.28-948,412,461.60-378,205,961.28

Finding the Fourth Proportional to 687,255,305.28, 948,412,461.60 and 378,205,961.28

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Solution

The fourth proportional to 687,255,305.28, 948,412,461.60 and 378,205,961.28 is: 521,924,303.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,255,305.28 : 948,412,461.60 = 378,205,961.28 : x
  2. Step 2: Convert to fraction form
    687,255,305.28/948,412,461.60 = 378,205,961.28/x
  3. Step 3: Cross multiply
    687,255,305.28x = 948,412,461.60 × 378,205,961.28
  4. Step 4: Simplify right side
    687,255,305.28x = 358,695,246,729,359,040
  5. Step 5: Solve for x
    x = 358,695,246,729,359,040/687,255,305.28
  6. Step 6: Final answer
    x = 521,924,303.78

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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.