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Finding the Fourth Proportional to 1,242.38, 1,863.87 and 376.64

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Solution

The fourth proportional to 1,242.38, 1,863.87 and 376.64 is: 565.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.38 : 1,863.87 = 376.64 : x
  2. Step 2: Convert to fraction form
    1,242.38/1,863.87 = 376.64/x
  3. Step 3: Cross multiply
    1,242.38x = 1,863.87 × 376.64
  4. Step 4: Simplify right side
    1,242.38x = 702,008.00
  5. Step 5: Solve for x
    x = 702,008.00/1,242.38
  6. Step 6: Final answer
    x = 565.05

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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.