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Finding the Fourth Proportional to 1,791.23, 2,686.49 and 558.65

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Solution

The fourth proportional to 1,791.23, 2,686.49 and 558.65 is: 837.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.23 : 2,686.49 = 558.65 : x
  2. Step 2: Convert to fraction form
    1,791.23/2,686.49 = 558.65/x
  3. Step 3: Cross multiply
    1,791.23x = 2,686.49 × 558.65
  4. Step 4: Simplify right side
    1,791.23x = 1,500,807.64
  5. Step 5: Solve for x
    x = 1,500,807.64/1,791.23
  6. Step 6: Final answer
    x = 837.87

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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.