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Finding the Fourth Proportional to 472,006.80, 708,010.20 and 219,286.80

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Solution

The fourth proportional to 472,006.80, 708,010.20 and 219,286.80 is: 328,930.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,006.80 : 708,010.20 = 219,286.80 : x
  2. Step 2: Convert to fraction form
    472,006.80/708,010.20 = 219,286.80/x
  3. Step 3: Cross multiply
    472,006.80x = 708,010.20 × 219,286.80
  4. Step 4: Simplify right side
    472,006.80x = 155,257,291,125.36
  5. Step 5: Solve for x
    x = 155,257,291,125.36/472,006.80
  6. Step 6: Final answer
    x = 328,930.20

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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.