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Finding the Fourth Proportional to 286.56, 430.12 and 124.30

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Solution

The fourth proportional to 286.56, 430.12 and 124.30 is: 186.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.56 : 430.12 = 124.30 : x
  2. Step 2: Convert to fraction form
    286.56/430.12 = 124.30/x
  3. Step 3: Cross multiply
    286.56x = 430.12 × 124.30
  4. Step 4: Simplify right side
    286.56x = 53,463.92
  5. Step 5: Solve for x
    x = 53,463.92/286.56
  6. Step 6: Final answer
    x = 186.57

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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.