Home / 1,111.27-1,531.77-757.07

Finding the Fourth Proportional to 1,111.27, 1,531.77 and 757.07

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Solution

The fourth proportional to 1,111.27, 1,531.77 and 757.07 is: 1,043.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.27 : 1,531.77 = 757.07 : x
  2. Step 2: Convert to fraction form
    1,111.27/1,531.77 = 757.07/x
  3. Step 3: Cross multiply
    1,111.27x = 1,531.77 × 757.07
  4. Step 4: Simplify right side
    1,111.27x = 1,159,657.11
  5. Step 5: Solve for x
    x = 1,159,657.11/1,111.27
  6. Step 6: Final answer
    x = 1,043.54

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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.