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Finding the Fourth Proportional to 318,838.96, 478,324.86 and 169,038.55

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Solution

The fourth proportional to 318,838.96, 478,324.86 and 169,038.55 is: 253,593.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,838.96 : 478,324.86 = 169,038.55 : x
  2. Step 2: Convert to fraction form
    318,838.96/478,324.86 = 169,038.55/x
  3. Step 3: Cross multiply
    318,838.96x = 478,324.86 × 169,038.55
  4. Step 4: Simplify right side
    318,838.96x = 80,855,340,763.35
  5. Step 5: Solve for x
    x = 80,855,340,763.35/318,838.96
  6. Step 6: Final answer
    x = 253,593.04

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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.