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Finding the Fourth Proportional to 664,459.80, 996,689.70 and 486,000.60

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Solution

The fourth proportional to 664,459.80, 996,689.70 and 486,000.60 is: 729,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,459.80 : 996,689.70 = 486,000.60 : x
  2. Step 2: Convert to fraction form
    664,459.80/996,689.70 = 486,000.60/x
  3. Step 3: Cross multiply
    664,459.80x = 996,689.70 × 486,000.60
  4. Step 4: Simplify right side
    664,459.80x = 484,391,792,213.82
  5. Step 5: Solve for x
    x = 484,391,792,213.82/664,459.80
  6. Step 6: Final answer
    x = 729,000.90

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Half scale
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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.