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Finding the Fourth Proportional to 191.52, 286.90 and 130.50

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Solution

The fourth proportional to 191.52, 286.90 and 130.50 is: 195.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.52 : 286.90 = 130.50 : x
  2. Step 2: Convert to fraction form
    191.52/286.90 = 130.50/x
  3. Step 3: Cross multiply
    191.52x = 286.90 × 130.50
  4. Step 4: Simplify right side
    191.52x = 37,440.12
  5. Step 5: Solve for x
    x = 37,440.12/191.52
  6. Step 6: Final answer
    x = 195.49

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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.