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Finding the Fourth Proportional to 281.52, 388.05 and 214.91

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Solution

The fourth proportional to 281.52, 388.05 and 214.91 is: 296.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.52 : 388.05 = 214.91 : x
  2. Step 2: Convert to fraction form
    281.52/388.05 = 214.91/x
  3. Step 3: Cross multiply
    281.52x = 388.05 × 214.91
  4. Step 4: Simplify right side
    281.52x = 83,395.83
  5. Step 5: Solve for x
    x = 83,395.83/281.52
  6. Step 6: Final answer
    x = 296.23

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.