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Finding the Fourth Proportional to 280.13, 386.17 and 214.52

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Solution

The fourth proportional to 280.13, 386.17 and 214.52 is: 295.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.13 : 386.17 = 214.52 : x
  2. Step 2: Convert to fraction form
    280.13/386.17 = 214.52/x
  3. Step 3: Cross multiply
    280.13x = 386.17 × 214.52
  4. Step 4: Simplify right side
    280.13x = 82,838.72
  5. Step 5: Solve for x
    x = 82,838.72/280.13
  6. Step 6: Final answer
    x = 295.72

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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.