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Finding the Fourth Proportional to 286.47, 429.68 and 178.18

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Solution

The fourth proportional to 286.47, 429.68 and 178.18 is: 267.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.47 : 429.68 = 178.18 : x
  2. Step 2: Convert to fraction form
    286.47/429.68 = 178.18/x
  3. Step 3: Cross multiply
    286.47x = 429.68 × 178.18
  4. Step 4: Simplify right side
    286.47x = 76,559.75
  5. Step 5: Solve for x
    x = 76,559.75/286.47
  6. Step 6: Final answer
    x = 267.25

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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.