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Finding the Fourth Proportional to 261,246.89, 391,936.16 and 74,258.39

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Solution

The fourth proportional to 261,246.89, 391,936.16 and 74,258.39 is: 111,406.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,246.89 : 391,936.16 = 74,258.39 : x
  2. Step 2: Convert to fraction form
    261,246.89/391,936.16 = 74,258.39/x
  3. Step 3: Cross multiply
    261,246.89x = 391,936.16 × 74,258.39
  4. Step 4: Simplify right side
    261,246.89x = 29,104,546,264.70
  5. Step 5: Solve for x
    x = 29,104,546,264.70/261,246.89
  6. Step 6: Final answer
    x = 111,406.29

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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.