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Finding the Fourth Proportional to 316.10, 474.15 and 133.45

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Solution

The fourth proportional to 316.10, 474.15 and 133.45 is: 200.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.10 : 474.15 = 133.45 : x
  2. Step 2: Convert to fraction form
    316.10/474.15 = 133.45/x
  3. Step 3: Cross multiply
    316.10x = 474.15 × 133.45
  4. Step 4: Simplify right side
    316.10x = 63,275.32
  5. Step 5: Solve for x
    x = 63,275.32/316.10
  6. Step 6: Final answer
    x = 200.18

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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.