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Finding the Fourth Proportional to 543,187.70, 814,781.55 and 342,421.10

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Solution

The fourth proportional to 543,187.70, 814,781.55 and 342,421.10 is: 513,631.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,187.70 : 814,781.55 = 342,421.10 : x
  2. Step 2: Convert to fraction form
    543,187.70/814,781.55 = 342,421.10/x
  3. Step 3: Cross multiply
    543,187.70x = 814,781.55 × 342,421.10
  4. Step 4: Simplify right side
    543,187.70x = 278,998,394,610.71
  5. Step 5: Solve for x
    x = 278,998,394,610.71/543,187.70
  6. Step 6: Final answer
    x = 513,631.65

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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.