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Finding the Fourth Proportional to 1,237.75, 1,856.70 and 372.13

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Solution

The fourth proportional to 1,237.75, 1,856.70 and 372.13 is: 558.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.75 : 1,856.70 = 372.13 : x
  2. Step 2: Convert to fraction form
    1,237.75/1,856.70 = 372.13/x
  3. Step 3: Cross multiply
    1,237.75x = 1,856.70 × 372.13
  4. Step 4: Simplify right side
    1,237.75x = 690,933.77
  5. Step 5: Solve for x
    x = 690,933.77/1,237.75
  6. Step 6: Final answer
    x = 558.22

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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.