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Finding the Fourth Proportional to 521,617.20, 782,425.80 and 166,667.10

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Solution

The fourth proportional to 521,617.20, 782,425.80 and 166,667.10 is: 250,000.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,617.20 : 782,425.80 = 166,667.10 : x
  2. Step 2: Convert to fraction form
    521,617.20/782,425.80 = 166,667.10/x
  3. Step 3: Cross multiply
    521,617.20x = 782,425.80 × 166,667.10
  4. Step 4: Simplify right side
    521,617.20x = 130,404,639,051.18
  5. Step 5: Solve for x
    x = 130,404,639,051.18/521,617.20
  6. Step 6: Final answer
    x = 250,000.65

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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.