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Finding the Fourth Proportional to 983.29, 1,356.85 and 541.18

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Solution

The fourth proportional to 983.29, 1,356.85 and 541.18 is: 746.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.29 : 1,356.85 = 541.18 : x
  2. Step 2: Convert to fraction form
    983.29/1,356.85 = 541.18/x
  3. Step 3: Cross multiply
    983.29x = 1,356.85 × 541.18
  4. Step 4: Simplify right side
    983.29x = 734,302.46
  5. Step 5: Solve for x
    x = 734,302.46/983.29
  6. Step 6: Final answer
    x = 746.78

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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.