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Finding the Fourth Proportional to 282.35, 423.68 and 120.15

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Solution

The fourth proportional to 282.35, 423.68 and 120.15 is: 180.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.35 : 423.68 = 120.15 : x
  2. Step 2: Convert to fraction form
    282.35/423.68 = 120.15/x
  3. Step 3: Cross multiply
    282.35x = 423.68 × 120.15
  4. Step 4: Simplify right side
    282.35x = 50,904.55
  5. Step 5: Solve for x
    x = 50,904.55/282.35
  6. Step 6: Final answer
    x = 180.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.