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Finding the Fourth Proportional to 642,073.30, 962,883.15 and 221,251.30

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Solution

The fourth proportional to 642,073.30, 962,883.15 and 221,251.30 is: 331,798.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,073.30 : 962,883.15 = 221,251.30 : x
  2. Step 2: Convert to fraction form
    642,073.30/962,883.15 = 221,251.30/x
  3. Step 3: Cross multiply
    642,073.30x = 962,883.15 × 221,251.30
  4. Step 4: Simplify right side
    642,073.30x = 213,039,148,685.60
  5. Step 5: Solve for x
    x = 213,039,148,685.60/642,073.30
  6. Step 6: Final answer
    x = 331,798.80

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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.