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Finding the Fourth Proportional to 512.65, 769.21 and 187.95

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Solution

The fourth proportional to 512.65, 769.21 and 187.95 is: 282.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.65 : 769.21 = 187.95 : x
  2. Step 2: Convert to fraction form
    512.65/769.21 = 187.95/x
  3. Step 3: Cross multiply
    512.65x = 769.21 × 187.95
  4. Step 4: Simplify right side
    512.65x = 144,569.21
  5. Step 5: Solve for x
    x = 144,569.21/512.65
  6. Step 6: Final answer
    x = 282.00

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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.