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Finding the Fourth Proportional to 318,992.80, 478,557.84 and 159,154.69

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Solution

The fourth proportional to 318,992.80, 478,557.84 and 159,154.69 is: 238,766.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,992.80 : 478,557.84 = 159,154.69 : x
  2. Step 2: Convert to fraction form
    318,992.80/478,557.84 = 159,154.69/x
  3. Step 3: Cross multiply
    318,992.80x = 478,557.84 × 159,154.69
  4. Step 4: Simplify right side
    318,992.80x = 76,164,721,483.71
  5. Step 5: Solve for x
    x = 76,164,721,483.71/318,992.80
  6. Step 6: Final answer
    x = 238,766.28

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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.