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Finding the Fourth Proportional to 621,687.20, 932,530.80 and 201,005.60

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Solution

The fourth proportional to 621,687.20, 932,530.80 and 201,005.60 is: 301,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,687.20 : 932,530.80 = 201,005.60 : x
  2. Step 2: Convert to fraction form
    621,687.20/932,530.80 = 201,005.60/x
  3. Step 3: Cross multiply
    621,687.20x = 932,530.80 × 201,005.60
  4. Step 4: Simplify right side
    621,687.20x = 187,443,912,972.48
  5. Step 5: Solve for x
    x = 187,443,912,972.48/621,687.20
  6. Step 6: Final answer
    x = 301,508.40

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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.