Home / 1,115.26-1,538.96-617.90

Finding the Fourth Proportional to 1,115.26, 1,538.96 and 617.90

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Solution

The fourth proportional to 1,115.26, 1,538.96 and 617.90 is: 852.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.26 : 1,538.96 = 617.90 : x
  2. Step 2: Convert to fraction form
    1,115.26/1,538.96 = 617.90/x
  3. Step 3: Cross multiply
    1,115.26x = 1,538.96 × 617.90
  4. Step 4: Simplify right side
    1,115.26x = 950,923.38
  5. Step 5: Solve for x
    x = 950,923.38/1,115.26
  6. Step 6: Final answer
    x = 852.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.