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Finding the Fourth Proportional to 1,237.11, 1,855.62 and 371.40

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Solution

The fourth proportional to 1,237.11, 1,855.62 and 371.40 is: 557.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.11 : 1,855.62 = 371.40 : x
  2. Step 2: Convert to fraction form
    1,237.11/1,855.62 = 371.40/x
  3. Step 3: Cross multiply
    1,237.11x = 1,855.62 × 371.40
  4. Step 4: Simplify right side
    1,237.11x = 689,177.27
  5. Step 5: Solve for x
    x = 689,177.27/1,237.11
  6. Step 6: Final answer
    x = 557.09

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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.