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Finding the Fourth Proportional to 342.04, 512.67 and 147.20

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Solution

The fourth proportional to 342.04, 512.67 and 147.20 is: 220.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.04 : 512.67 = 147.20 : x
  2. Step 2: Convert to fraction form
    342.04/512.67 = 147.20/x
  3. Step 3: Cross multiply
    342.04x = 512.67 × 147.20
  4. Step 4: Simplify right side
    342.04x = 75,465.02
  5. Step 5: Solve for x
    x = 75,465.02/342.04
  6. Step 6: Final answer
    x = 220.63

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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.