Home / 1,132.40-1,561.44-712.23

Finding the Fourth Proportional to 1,132.40, 1,561.44 and 712.23

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Solution

The fourth proportional to 1,132.40, 1,561.44 and 712.23 is: 982.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.40 : 1,561.44 = 712.23 : x
  2. Step 2: Convert to fraction form
    1,132.40/1,561.44 = 712.23/x
  3. Step 3: Cross multiply
    1,132.40x = 1,561.44 × 712.23
  4. Step 4: Simplify right side
    1,132.40x = 1,112,100.85
  5. Step 5: Solve for x
    x = 1,112,100.85/1,132.40
  6. Step 6: Final answer
    x = 982.08

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1.5x scale

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.