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Finding the Fourth Proportional to 261,046.80, 391,570.20 and 247,568.40

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Solution

The fourth proportional to 261,046.80, 391,570.20 and 247,568.40 is: 371,352.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,046.80 : 391,570.20 = 247,568.40 : x
  2. Step 2: Convert to fraction form
    261,046.80/391,570.20 = 247,568.40/x
  3. Step 3: Cross multiply
    261,046.80x = 391,570.20 × 247,568.40
  4. Step 4: Simplify right side
    261,046.80x = 96,940,407,901.68
  5. Step 5: Solve for x
    x = 96,940,407,901.68/261,046.80
  6. Step 6: Final answer
    x = 371,352.60

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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.