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Finding the Fourth Proportional to 574,443.20, 861,664.80 and 455,470.40

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Solution

The fourth proportional to 574,443.20, 861,664.80 and 455,470.40 is: 683,205.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    574,443.20 : 861,664.80 = 455,470.40 : x
  2. Step 2: Convert to fraction form
    574,443.20/861,664.80 = 455,470.40/x
  3. Step 3: Cross multiply
    574,443.20x = 861,664.80 × 455,470.40
  4. Step 4: Simplify right side
    574,443.20x = 392,462,811,121.92
  5. Step 5: Solve for x
    x = 392,462,811,121.92/574,443.20
  6. Step 6: Final answer
    x = 683,205.60

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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.