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Finding the Fourth Proportional to 342.51, 513.86 and 147.41

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Solution

The fourth proportional to 342.51, 513.86 and 147.41 is: 221.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.51 : 513.86 = 147.41 : x
  2. Step 2: Convert to fraction form
    342.51/513.86 = 147.41/x
  3. Step 3: Cross multiply
    342.51x = 513.86 × 147.41
  4. Step 4: Simplify right side
    342.51x = 75,748.10
  5. Step 5: Solve for x
    x = 75,748.10/342.51
  6. Step 6: Final answer
    x = 221.16

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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.