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Finding the Fourth Proportional to 261,388.80, 391,046.40 and 226,713.60

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Solution

The fourth proportional to 261,388.80, 391,046.40 and 226,713.60 is: 339,171.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,388.80 : 391,046.40 = 226,713.60 : x
  2. Step 2: Convert to fraction form
    261,388.80/391,046.40 = 226,713.60/x
  3. Step 3: Cross multiply
    261,388.80x = 391,046.40 × 226,713.60
  4. Step 4: Simplify right side
    261,388.80x = 88,655,537,111.04
  5. Step 5: Solve for x
    x = 88,655,537,111.04/261,388.80
  6. Step 6: Final answer
    x = 339,171.14

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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.