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Finding the Fourth Proportional to 188.70, 260.50 and 147.16

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Solution

The fourth proportional to 188.70, 260.50 and 147.16 is: 203.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.70 : 260.50 = 147.16 : x
  2. Step 2: Convert to fraction form
    188.70/260.50 = 147.16/x
  3. Step 3: Cross multiply
    188.70x = 260.50 × 147.16
  4. Step 4: Simplify right side
    188.70x = 38,335.18
  5. Step 5: Solve for x
    x = 38,335.18/188.70
  6. Step 6: Final answer
    x = 203.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.