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Finding the Fourth Proportional to 664,307.20, 996,460.80 and 658,086.40

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Solution

The fourth proportional to 664,307.20, 996,460.80 and 658,086.40 is: 987,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,307.20 : 996,460.80 = 658,086.40 : x
  2. Step 2: Convert to fraction form
    664,307.20/996,460.80 = 658,086.40/x
  3. Step 3: Cross multiply
    664,307.20x = 996,460.80 × 658,086.40
  4. Step 4: Simplify right side
    664,307.20x = 655,757,300,613.12
  5. Step 5: Solve for x
    x = 655,757,300,613.12/664,307.20
  6. Step 6: Final answer
    x = 987,129.60

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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.