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Finding the Fourth Proportional to 618,139.20, 927,208.80 and 477,998.40

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Solution

The fourth proportional to 618,139.20, 927,208.80 and 477,998.40 is: 716,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,139.20 : 927,208.80 = 477,998.40 : x
  2. Step 2: Convert to fraction form
    618,139.20/927,208.80 = 477,998.40/x
  3. Step 3: Cross multiply
    618,139.20x = 927,208.80 × 477,998.40
  4. Step 4: Simplify right side
    618,139.20x = 443,204,322,865.92
  5. Step 5: Solve for x
    x = 443,204,322,865.92/618,139.20
  6. Step 6: Final answer
    x = 716,997.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.