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Finding the Fourth Proportional to 282.53, 389.51 and 216.18

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Solution

The fourth proportional to 282.53, 389.51 and 216.18 is: 298.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.53 : 389.51 = 216.18 : x
  2. Step 2: Convert to fraction form
    282.53/389.51 = 216.18/x
  3. Step 3: Cross multiply
    282.53x = 389.51 × 216.18
  4. Step 4: Simplify right side
    282.53x = 84,205.22
  5. Step 5: Solve for x
    x = 84,205.22/282.53
  6. Step 6: Final answer
    x = 298.04

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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.