Home / 1,115.15-1,538.92-617.80

Finding the Fourth Proportional to 1,115.15, 1,538.92 and 617.80

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Solution

The fourth proportional to 1,115.15, 1,538.92 and 617.80 is: 852.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.15 : 1,538.92 = 617.80 : x
  2. Step 2: Convert to fraction form
    1,115.15/1,538.92 = 617.80/x
  3. Step 3: Cross multiply
    1,115.15x = 1,538.92 × 617.80
  4. Step 4: Simplify right side
    1,115.15x = 950,737.08
  5. Step 5: Solve for x
    x = 950,737.08/1,115.15
  6. Step 6: Final answer
    x = 852.56

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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.