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Finding the Fourth Proportional to 352,990.71, 529,272.43 and 142,382.61

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Solution

The fourth proportional to 352,990.71, 529,272.43 and 142,382.61 is: 213,487.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,990.71 : 529,272.43 = 142,382.61 : x
  2. Step 2: Convert to fraction form
    352,990.71/529,272.43 = 142,382.61/x
  3. Step 3: Cross multiply
    352,990.71x = 529,272.43 × 142,382.61
  4. Step 4: Simplify right side
    352,990.71x = 75,359,189,628.49
  5. Step 5: Solve for x
    x = 75,359,189,628.49/352,990.71
  6. Step 6: Final answer
    x = 213,487.74

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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.