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Finding the Fourth Proportional to 1,237.89, 1,855.23 and 927.30

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Solution

The fourth proportional to 1,237.89, 1,855.23 and 927.30 is: 1,389.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.89 : 1,855.23 = 927.30 : x
  2. Step 2: Convert to fraction form
    1,237.89/1,855.23 = 927.30/x
  3. Step 3: Cross multiply
    1,237.89x = 1,855.23 × 927.30
  4. Step 4: Simplify right side
    1,237.89x = 1,720,354.78
  5. Step 5: Solve for x
    x = 1,720,354.78/1,237.89
  6. Step 6: Final answer
    x = 1,389.75

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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.