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Finding the Fourth Proportional to 282.20, 387.14 and 275.04

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Solution

The fourth proportional to 282.20, 387.14 and 275.04 is: 377.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.20 : 387.14 = 275.04 : x
  2. Step 2: Convert to fraction form
    282.20/387.14 = 275.04/x
  3. Step 3: Cross multiply
    282.20x = 387.14 × 275.04
  4. Step 4: Simplify right side
    282.20x = 106,477.61
  5. Step 5: Solve for x
    x = 106,477.61/282.20
  6. Step 6: Final answer
    x = 377.32

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.