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Finding the Fourth Proportional to 342.04, 512.56 and 146.86

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Solution

The fourth proportional to 342.04, 512.56 and 146.86 is: 220.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.04 : 512.56 = 146.86 : x
  2. Step 2: Convert to fraction form
    342.04/512.56 = 146.86/x
  3. Step 3: Cross multiply
    342.04x = 512.56 × 146.86
  4. Step 4: Simplify right side
    342.04x = 75,274.56
  5. Step 5: Solve for x
    x = 75,274.56/342.04
  6. Step 6: Final answer
    x = 220.08

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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.