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Finding the Fourth Proportional to 318.95, 478.57 and 174.66

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Solution

The fourth proportional to 318.95, 478.57 and 174.66 is: 262.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.95 : 478.57 = 174.66 : x
  2. Step 2: Convert to fraction form
    318.95/478.57 = 174.66/x
  3. Step 3: Cross multiply
    318.95x = 478.57 × 174.66
  4. Step 4: Simplify right side
    318.95x = 83,587.04
  5. Step 5: Solve for x
    x = 83,587.04/318.95
  6. Step 6: Final answer
    x = 262.07

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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.