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Finding the Fourth Proportional to 247,212.80, 370,819.20 and 217,688.30

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Solution

The fourth proportional to 247,212.80, 370,819.20 and 217,688.30 is: 326,532.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,212.80 : 370,819.20 = 217,688.30 : x
  2. Step 2: Convert to fraction form
    247,212.80/370,819.20 = 217,688.30/x
  3. Step 3: Cross multiply
    247,212.80x = 370,819.20 × 217,688.30
  4. Step 4: Simplify right side
    247,212.80x = 80,723,001,255.36
  5. Step 5: Solve for x
    x = 80,723,001,255.36/247,212.80
  6. Step 6: Final answer
    x = 326,532.45

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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.