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Finding the Fourth Proportional to 1,238.32, 1,857.54 and 372.56

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Solution

The fourth proportional to 1,238.32, 1,857.54 and 372.56 is: 558.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.32 : 1,857.54 = 372.56 : x
  2. Step 2: Convert to fraction form
    1,238.32/1,857.54 = 372.56/x
  3. Step 3: Cross multiply
    1,238.32x = 1,857.54 × 372.56
  4. Step 4: Simplify right side
    1,238.32x = 692,045.10
  5. Step 5: Solve for x
    x = 692,045.10/1,238.32
  6. Step 6: Final answer
    x = 558.86

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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.