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Finding the Fourth Proportional to 460.89, 691.49 and 152.78

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Solution

The fourth proportional to 460.89, 691.49 and 152.78 is: 229.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.89 : 691.49 = 152.78 : x
  2. Step 2: Convert to fraction form
    460.89/691.49 = 152.78/x
  3. Step 3: Cross multiply
    460.89x = 691.49 × 152.78
  4. Step 4: Simplify right side
    460.89x = 105,642.77
  5. Step 5: Solve for x
    x = 105,642.77/460.89
  6. Step 6: Final answer
    x = 229.21

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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.