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Finding the Fourth Proportional to 637,489.80, 956,234.70 and 438,424.20

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Solution

The fourth proportional to 637,489.80, 956,234.70 and 438,424.20 is: 657,636.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,489.80 : 956,234.70 = 438,424.20 : x
  2. Step 2: Convert to fraction form
    637,489.80/956,234.70 = 438,424.20/x
  3. Step 3: Cross multiply
    637,489.80x = 956,234.70 × 438,424.20
  4. Step 4: Simplify right side
    637,489.80x = 419,236,433,359.74
  5. Step 5: Solve for x
    x = 419,236,433,359.74/637,489.80
  6. Step 6: Final answer
    x = 657,636.30

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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.