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Finding the Fourth Proportional to 340.26, 510.12 and 147.78

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Solution

The fourth proportional to 340.26, 510.12 and 147.78 is: 221.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.26 : 510.12 = 147.78 : x
  2. Step 2: Convert to fraction form
    340.26/510.12 = 147.78/x
  3. Step 3: Cross multiply
    340.26x = 510.12 × 147.78
  4. Step 4: Simplify right side
    340.26x = 75,385.53
  5. Step 5: Solve for x
    x = 75,385.53/340.26
  6. Step 6: Final answer
    x = 221.55

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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.