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Finding the Fourth Proportional to 1,238.28, 1,857.16 and 372.40

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Solution

The fourth proportional to 1,238.28, 1,857.16 and 372.40 is: 558.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.28 : 1,857.16 = 372.40 : x
  2. Step 2: Convert to fraction form
    1,238.28/1,857.16 = 372.40/x
  3. Step 3: Cross multiply
    1,238.28x = 1,857.16 × 372.40
  4. Step 4: Simplify right side
    1,238.28x = 691,606.38
  5. Step 5: Solve for x
    x = 691,606.38/1,238.28
  6. Step 6: Final answer
    x = 558.52

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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.