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Finding the Fourth Proportional to 983.51, 1,481.12 and 887.12

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Solution

The fourth proportional to 983.51, 1,481.12 and 887.12 is: 1,335.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.51 : 1,481.12 = 887.12 : x
  2. Step 2: Convert to fraction form
    983.51/1,481.12 = 887.12/x
  3. Step 3: Cross multiply
    983.51x = 1,481.12 × 887.12
  4. Step 4: Simplify right side
    983.51x = 1,313,931.17
  5. Step 5: Solve for x
    x = 1,313,931.17/983.51
  6. Step 6: Final answer
    x = 1,335.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.