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Finding the Fourth Proportional to 261,015.20, 391,522.80 and 176,815.70

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Solution

The fourth proportional to 261,015.20, 391,522.80 and 176,815.70 is: 265,223.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,015.20 : 391,522.80 = 176,815.70 : x
  2. Step 2: Convert to fraction form
    261,015.20/391,522.80 = 176,815.70/x
  3. Step 3: Cross multiply
    261,015.20x = 391,522.80 × 176,815.70
  4. Step 4: Simplify right side
    261,015.20x = 69,227,377,947.96
  5. Step 5: Solve for x
    x = 69,227,377,947.96/261,015.20
  6. Step 6: Final answer
    x = 265,223.55

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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.