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Finding the Fourth Proportional to 457,789.80, 686,684.70 and 317,821.80

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Solution

The fourth proportional to 457,789.80, 686,684.70 and 317,821.80 is: 476,732.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,789.80 : 686,684.70 = 317,821.80 : x
  2. Step 2: Convert to fraction form
    457,789.80/686,684.70 = 317,821.80/x
  3. Step 3: Cross multiply
    457,789.80x = 686,684.70 × 317,821.80
  4. Step 4: Simplify right side
    457,789.80x = 218,243,367,386.46
  5. Step 5: Solve for x
    x = 218,243,367,386.46/457,789.80
  6. Step 6: Final answer
    x = 476,732.70

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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.