Home / 1,112.85-1,536.27-740.45

Finding the Fourth Proportional to 1,112.85, 1,536.27 and 740.45

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Solution

The fourth proportional to 1,112.85, 1,536.27 and 740.45 is: 1,022.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.85 : 1,536.27 = 740.45 : x
  2. Step 2: Convert to fraction form
    1,112.85/1,536.27 = 740.45/x
  3. Step 3: Cross multiply
    1,112.85x = 1,536.27 × 740.45
  4. Step 4: Simplify right side
    1,112.85x = 1,137,531.12
  5. Step 5: Solve for x
    x = 1,137,531.12/1,112.85
  6. Step 6: Final answer
    x = 1,022.18

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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.