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Finding the Fourth Proportional to 218.74, 328.30 and 116.10

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Solution

The fourth proportional to 218.74, 328.30 and 116.10 is: 174.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.74 : 328.30 = 116.10 : x
  2. Step 2: Convert to fraction form
    218.74/328.30 = 116.10/x
  3. Step 3: Cross multiply
    218.74x = 328.30 × 116.10
  4. Step 4: Simplify right side
    218.74x = 38,115.63
  5. Step 5: Solve for x
    x = 38,115.63/218.74
  6. Step 6: Final answer
    x = 174.25

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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.