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Finding the Fourth Proportional to 316.61, 474.33 and 153.93

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Solution

The fourth proportional to 316.61, 474.33 and 153.93 is: 230.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.61 : 474.33 = 153.93 : x
  2. Step 2: Convert to fraction form
    316.61/474.33 = 153.93/x
  3. Step 3: Cross multiply
    316.61x = 474.33 × 153.93
  4. Step 4: Simplify right side
    316.61x = 73,013.62
  5. Step 5: Solve for x
    x = 73,013.62/316.61
  6. Step 6: Final answer
    x = 230.61

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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.