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Finding the Fourth Proportional to 442,642.80, 663,964.20 and 432,801.30

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Solution

The fourth proportional to 442,642.80, 663,964.20 and 432,801.30 is: 649,201.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,642.80 : 663,964.20 = 432,801.30 : x
  2. Step 2: Convert to fraction form
    442,642.80/663,964.20 = 432,801.30/x
  3. Step 3: Cross multiply
    442,642.80x = 663,964.20 × 432,801.30
  4. Step 4: Simplify right side
    442,642.80x = 287,364,568,913.46
  5. Step 5: Solve for x
    x = 287,364,568,913.46/442,642.80
  6. Step 6: Final answer
    x = 649,201.95

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Double scale
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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.