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Finding the Fourth Proportional to 247,672.80, 371,509.20 and 208,306.80

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Solution

The fourth proportional to 247,672.80, 371,509.20 and 208,306.80 is: 312,460.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,672.80 : 371,509.20 = 208,306.80 : x
  2. Step 2: Convert to fraction form
    247,672.80/371,509.20 = 208,306.80/x
  3. Step 3: Cross multiply
    247,672.80x = 371,509.20 × 208,306.80
  4. Step 4: Simplify right side
    247,672.80x = 77,387,892,622.56
  5. Step 5: Solve for x
    x = 77,387,892,622.56/247,672.80
  6. Step 6: Final answer
    x = 312,460.20

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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.