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Finding the Fourth Proportional to 316.47, 473.45 and 239.66

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Solution

The fourth proportional to 316.47, 473.45 and 239.66 is: 358.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.47 : 473.45 = 239.66 : x
  2. Step 2: Convert to fraction form
    316.47/473.45 = 239.66/x
  3. Step 3: Cross multiply
    316.47x = 473.45 × 239.66
  4. Step 4: Simplify right side
    316.47x = 113,464.66
  5. Step 5: Solve for x
    x = 113,464.66/316.47
  6. Step 6: Final answer
    x = 358.53

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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.