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Finding the Fourth Proportional to 318,730.92, 478,001.34 and 108,321

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Solution

The fourth proportional to 318,730.92, 478,001.34 and 108,321 is: 162,449.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,730.92 : 478,001.34 = 108,321 : x
  2. Step 2: Convert to fraction form
    318,730.92/478,001.34 = 108,321/x
  3. Step 3: Cross multiply
    318,730.92x = 478,001.34 × 108,321
  4. Step 4: Simplify right side
    318,730.92x = 51,777,583,150.14
  5. Step 5: Solve for x
    x = 51,777,583,150.14/318,730.92
  6. Step 6: Final answer
    x = 162,449.20

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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.