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Finding the Fourth Proportional to 353,217.07, 488,723.11 and 307,989.30

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Solution

The fourth proportional to 353,217.07, 488,723.11 and 307,989.30 is: 426,144.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,217.07 : 488,723.11 = 307,989.30 : x
  2. Step 2: Convert to fraction form
    353,217.07/488,723.11 = 307,989.30/x
  3. Step 3: Cross multiply
    353,217.07x = 488,723.11 × 307,989.30
  4. Step 4: Simplify right side
    353,217.07x = 150,521,487,002.78
  5. Step 5: Solve for x
    x = 150,521,487,002.78/353,217.07
  6. Step 6: Final answer
    x = 426,144.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.