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Finding the Fourth Proportional to 664,354.40, 996,531.60 and 660,417.80

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Solution

The fourth proportional to 664,354.40, 996,531.60 and 660,417.80 is: 990,626.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,354.40 : 996,531.60 = 660,417.80 : x
  2. Step 2: Convert to fraction form
    664,354.40/996,531.60 = 660,417.80/x
  3. Step 3: Cross multiply
    664,354.40x = 996,531.60 × 660,417.80
  4. Step 4: Simplify right side
    664,354.40x = 658,127,206,902.48
  5. Step 5: Solve for x
    x = 658,127,206,902.48/664,354.40
  6. Step 6: Final answer
    x = 990,626.70

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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.