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Finding the Fourth Proportional to 343.17, 514.85 and 148.18

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Solution

The fourth proportional to 343.17, 514.85 and 148.18 is: 222.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.17 : 514.85 = 148.18 : x
  2. Step 2: Convert to fraction form
    343.17/514.85 = 148.18/x
  3. Step 3: Cross multiply
    343.17x = 514.85 × 148.18
  4. Step 4: Simplify right side
    343.17x = 76,290.47
  5. Step 5: Solve for x
    x = 76,290.47/343.17
  6. Step 6: Final answer
    x = 222.31

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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.