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Finding the Fourth Proportional to 261,038.30, 391,557.45 and 247,559.90

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Solution

The fourth proportional to 261,038.30, 391,557.45 and 247,559.90 is: 371,339.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,038.30 : 391,557.45 = 247,559.90 : x
  2. Step 2: Convert to fraction form
    261,038.30/391,557.45 = 247,559.90/x
  3. Step 3: Cross multiply
    261,038.30x = 391,557.45 × 247,559.90
  4. Step 4: Simplify right side
    261,038.30x = 96,933,923,166.26
  5. Step 5: Solve for x
    x = 96,933,923,166.26/261,038.30
  6. Step 6: Final answer
    x = 371,339.85

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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.