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Finding the Fourth Proportional to 656,326.80, 984,490.20 and 490,438.80

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Solution

The fourth proportional to 656,326.80, 984,490.20 and 490,438.80 is: 735,658.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,326.80 : 984,490.20 = 490,438.80 : x
  2. Step 2: Convert to fraction form
    656,326.80/984,490.20 = 490,438.80/x
  3. Step 3: Cross multiply
    656,326.80x = 984,490.20 × 490,438.80
  4. Step 4: Simplify right side
    656,326.80x = 482,832,192,299.76
  5. Step 5: Solve for x
    x = 482,832,192,299.76/656,326.80
  6. Step 6: Final answer
    x = 735,658.20

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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.