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Finding the Fourth Proportional to 282.55, 389.89 and 158.19

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Solution

The fourth proportional to 282.55, 389.89 and 158.19 is: 218.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.55 : 389.89 = 158.19 : x
  2. Step 2: Convert to fraction form
    282.55/389.89 = 158.19/x
  3. Step 3: Cross multiply
    282.55x = 389.89 × 158.19
  4. Step 4: Simplify right side
    282.55x = 61,677.28
  5. Step 5: Solve for x
    x = 61,677.28/282.55
  6. Step 6: Final answer
    x = 218.29

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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.