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Finding the Fourth Proportional to 219.13, 302.39 and 125.89

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Solution

The fourth proportional to 219.13, 302.39 and 125.89 is: 173.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.13 : 302.39 = 125.89 : x
  2. Step 2: Convert to fraction form
    219.13/302.39 = 125.89/x
  3. Step 3: Cross multiply
    219.13x = 302.39 × 125.89
  4. Step 4: Simplify right side
    219.13x = 38,065.74
  5. Step 5: Solve for x
    x = 38,065.74/219.13
  6. Step 6: Final answer
    x = 173.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.