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Finding the Fourth Proportional to 664,221.60, 996,332.40 and 439,835.40

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Solution

The fourth proportional to 664,221.60, 996,332.40 and 439,835.40 is: 659,753.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,221.60 : 996,332.40 = 439,835.40 : x
  2. Step 2: Convert to fraction form
    664,221.60/996,332.40 = 439,835.40/x
  3. Step 3: Cross multiply
    664,221.60x = 996,332.40 × 439,835.40
  4. Step 4: Simplify right side
    664,221.60x = 438,222,259,686.96
  5. Step 5: Solve for x
    x = 438,222,259,686.96/664,221.60
  6. Step 6: Final answer
    x = 659,753.10

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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.