Home / 1,144.80-1,718.15-981.32

Finding the Fourth Proportional to 1,144.80, 1,718.15 and 981.32

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Solution

The fourth proportional to 1,144.80, 1,718.15 and 981.32 is: 1,472.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.80 : 1,718.15 = 981.32 : x
  2. Step 2: Convert to fraction form
    1,144.80/1,718.15 = 981.32/x
  3. Step 3: Cross multiply
    1,144.80x = 1,718.15 × 981.32
  4. Step 4: Simplify right side
    1,144.80x = 1,686,041.46
  5. Step 5: Solve for x
    x = 1,686,041.46/1,144.80
  6. Step 6: Final answer
    x = 1,472.78

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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.