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Finding the Fourth Proportional to 272,960.60, 409,440.90 and 215,879.90

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Solution

The fourth proportional to 272,960.60, 409,440.90 and 215,879.90 is: 323,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,960.60 : 409,440.90 = 215,879.90 : x
  2. Step 2: Convert to fraction form
    272,960.60/409,440.90 = 215,879.90/x
  3. Step 3: Cross multiply
    272,960.60x = 409,440.90 × 215,879.90
  4. Step 4: Simplify right side
    272,960.60x = 88,390,060,547.91
  5. Step 5: Solve for x
    x = 88,390,060,547.91/272,960.60
  6. Step 6: Final answer
    x = 323,819.85

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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.