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Finding the Fourth Proportional to 1,146.88, 1,581.96 and 681.04

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Solution

The fourth proportional to 1,146.88, 1,581.96 and 681.04 is: 939.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.88 : 1,581.96 = 681.04 : x
  2. Step 2: Convert to fraction form
    1,146.88/1,581.96 = 681.04/x
  3. Step 3: Cross multiply
    1,146.88x = 1,581.96 × 681.04
  4. Step 4: Simplify right side
    1,146.88x = 1,077,378.04
  5. Step 5: Solve for x
    x = 1,077,378.04/1,146.88
  6. Step 6: Final answer
    x = 939.40

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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.