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Finding the Fourth Proportional to 318.76, 478.68 and 293.44

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Solution

The fourth proportional to 318.76, 478.68 and 293.44 is: 440.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.76 : 478.68 = 293.44 : x
  2. Step 2: Convert to fraction form
    318.76/478.68 = 293.44/x
  3. Step 3: Cross multiply
    318.76x = 478.68 × 293.44
  4. Step 4: Simplify right side
    318.76x = 140,463.86
  5. Step 5: Solve for x
    x = 140,463.86/318.76
  6. Step 6: Final answer
    x = 440.66

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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.