Home / 1,035.19-1,550.35-861.85

Finding the Fourth Proportional to 1,035.19, 1,550.35 and 861.85

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Solution

The fourth proportional to 1,035.19, 1,550.35 and 861.85 is: 1,290.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.19 : 1,550.35 = 861.85 : x
  2. Step 2: Convert to fraction form
    1,035.19/1,550.35 = 861.85/x
  3. Step 3: Cross multiply
    1,035.19x = 1,550.35 × 861.85
  4. Step 4: Simplify right side
    1,035.19x = 1,336,169.15
  5. Step 5: Solve for x
    x = 1,336,169.15/1,035.19
  6. Step 6: Final answer
    x = 1,290.75

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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.