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Finding the Fourth Proportional to 283.26, 390.54 and 230.61

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Solution

The fourth proportional to 283.26, 390.54 and 230.61 is: 317.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.26 : 390.54 = 230.61 : x
  2. Step 2: Convert to fraction form
    283.26/390.54 = 230.61/x
  3. Step 3: Cross multiply
    283.26x = 390.54 × 230.61
  4. Step 4: Simplify right side
    283.26x = 90,062.43
  5. Step 5: Solve for x
    x = 90,062.43/283.26
  6. Step 6: Final answer
    x = 317.95

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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.