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Finding the Fourth Proportional to 151.18, 210.05 and 149.58

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Solution

The fourth proportional to 151.18, 210.05 and 149.58 is: 207.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.18 : 210.05 = 149.58 : x
  2. Step 2: Convert to fraction form
    151.18/210.05 = 149.58/x
  3. Step 3: Cross multiply
    151.18x = 210.05 × 149.58
  4. Step 4: Simplify right side
    151.18x = 31,419.28
  5. Step 5: Solve for x
    x = 31,419.28/151.18
  6. Step 6: Final answer
    x = 207.83

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.