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Finding the Fourth Proportional to 618,407.20, 927,610.80 and 478,266.40

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Solution

The fourth proportional to 618,407.20, 927,610.80 and 478,266.40 is: 717,399.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,407.20 : 927,610.80 = 478,266.40 : x
  2. Step 2: Convert to fraction form
    618,407.20/927,610.80 = 478,266.40/x
  3. Step 3: Cross multiply
    618,407.20x = 927,610.80 × 478,266.40
  4. Step 4: Simplify right side
    618,407.20x = 443,645,077,917.12
  5. Step 5: Solve for x
    x = 443,645,077,917.12/618,407.20
  6. Step 6: Final answer
    x = 717,399.60

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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.