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Finding the Fourth Proportional to 664,632.20, 996,948.30 and 613,310.60

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Solution

The fourth proportional to 664,632.20, 996,948.30 and 613,310.60 is: 919,965.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,632.20 : 996,948.30 = 613,310.60 : x
  2. Step 2: Convert to fraction form
    664,632.20/996,948.30 = 613,310.60/x
  3. Step 3: Cross multiply
    664,632.20x = 996,948.30 × 613,310.60
  4. Step 4: Simplify right side
    664,632.20x = 611,438,960,041.98
  5. Step 5: Solve for x
    x = 611,438,960,041.98/664,632.20
  6. Step 6: Final answer
    x = 919,965.90

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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.