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Finding the Fourth Proportional to 521,017.20, 781,525.80 and 147,040.20

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Solution

The fourth proportional to 521,017.20, 781,525.80 and 147,040.20 is: 220,560.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,017.20 : 781,525.80 = 147,040.20 : x
  2. Step 2: Convert to fraction form
    521,017.20/781,525.80 = 147,040.20/x
  3. Step 3: Cross multiply
    521,017.20x = 781,525.80 × 147,040.20
  4. Step 4: Simplify right side
    521,017.20x = 114,915,709,937.16
  5. Step 5: Solve for x
    x = 114,915,709,937.16/521,017.20
  6. Step 6: Final answer
    x = 220,560.30

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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.