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Finding the Fourth Proportional to 663,691.60, 995,537.40 and 220,459.60

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Solution

The fourth proportional to 663,691.60, 995,537.40 and 220,459.60 is: 330,689.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,691.60 : 995,537.40 = 220,459.60 : x
  2. Step 2: Convert to fraction form
    663,691.60/995,537.40 = 220,459.60/x
  3. Step 3: Cross multiply
    663,691.60x = 995,537.40 × 220,459.60
  4. Step 4: Simplify right side
    663,691.60x = 219,475,776,989.04
  5. Step 5: Solve for x
    x = 219,475,776,989.04/663,691.60
  6. Step 6: Final answer
    x = 330,689.40

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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.