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Finding the Fourth Proportional to 301.24, 451.59 and 138.70

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Solution

The fourth proportional to 301.24, 451.59 and 138.70 is: 207.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.24 : 451.59 = 138.70 : x
  2. Step 2: Convert to fraction form
    301.24/451.59 = 138.70/x
  3. Step 3: Cross multiply
    301.24x = 451.59 × 138.70
  4. Step 4: Simplify right side
    301.24x = 62,635.53
  5. Step 5: Solve for x
    x = 62,635.53/301.24
  6. Step 6: Final answer
    x = 207.93

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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.