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Finding the Fourth Proportional to 347,712.40, 521,568.60 and 331,382.80

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Solution

The fourth proportional to 347,712.40, 521,568.60 and 331,382.80 is: 497,074.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,712.40 : 521,568.60 = 331,382.80 : x
  2. Step 2: Convert to fraction form
    347,712.40/521,568.60 = 331,382.80/x
  3. Step 3: Cross multiply
    347,712.40x = 521,568.60 × 331,382.80
  4. Step 4: Simplify right side
    347,712.40x = 172,838,863,060.08
  5. Step 5: Solve for x
    x = 172,838,863,060.08/347,712.40
  6. Step 6: Final answer
    x = 497,074.20

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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.