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Finding the Fourth Proportional to 228.13, 342.03 and 130.66

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Solution

The fourth proportional to 228.13, 342.03 and 130.66 is: 195.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.13 : 342.03 = 130.66 : x
  2. Step 2: Convert to fraction form
    228.13/342.03 = 130.66/x
  3. Step 3: Cross multiply
    228.13x = 342.03 × 130.66
  4. Step 4: Simplify right side
    228.13x = 44,689.64
  5. Step 5: Solve for x
    x = 44,689.64/228.13
  6. Step 6: Final answer
    x = 195.90

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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.