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Finding the Fourth Proportional to 521,221.50, 781,832.25 and 147,254.22

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Solution

The fourth proportional to 521,221.50, 781,832.25 and 147,254.22 is: 220,881.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,221.50 : 781,832.25 = 147,254.22 : x
  2. Step 2: Convert to fraction form
    521,221.50/781,832.25 = 147,254.22/x
  3. Step 3: Cross multiply
    521,221.50x = 781,832.25 × 147,254.22
  4. Step 4: Simplify right side
    521,221.50x = 115,128,098,144.60
  5. Step 5: Solve for x
    x = 115,128,098,144.60/521,221.50
  6. Step 6: Final answer
    x = 220,881.33

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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.