Home / 1,122.15-1,550.21-887.66

Finding the Fourth Proportional to 1,122.15, 1,550.21 and 887.66

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Solution

The fourth proportional to 1,122.15, 1,550.21 and 887.66 is: 1,226.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.15 : 1,550.21 = 887.66 : x
  2. Step 2: Convert to fraction form
    1,122.15/1,550.21 = 887.66/x
  3. Step 3: Cross multiply
    1,122.15x = 1,550.21 × 887.66
  4. Step 4: Simplify right side
    1,122.15x = 1,376,047.22
  5. Step 5: Solve for x
    x = 1,376,047.22/1,122.15
  6. Step 6: Final answer
    x = 1,226.26

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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.