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Finding the Fourth Proportional to 664,419.70, 996,629.55 and 487,272.70

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Solution

The fourth proportional to 664,419.70, 996,629.55 and 487,272.70 is: 730,909.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,419.70 : 996,629.55 = 487,272.70 : x
  2. Step 2: Convert to fraction form
    664,419.70/996,629.55 = 487,272.70/x
  3. Step 3: Cross multiply
    664,419.70x = 996,629.55 × 487,272.70
  4. Step 4: Simplify right side
    664,419.70x = 485,630,371,728.29
  5. Step 5: Solve for x
    x = 485,630,371,728.29/664,419.70
  6. Step 6: Final answer
    x = 730,909.05

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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.