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Finding the Fourth Proportional to 983.17, 1,356.78 and 541.15

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Solution

The fourth proportional to 983.17, 1,356.78 and 541.15 is: 746.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.17 : 1,356.78 = 541.15 : x
  2. Step 2: Convert to fraction form
    983.17/1,356.78 = 541.15/x
  3. Step 3: Cross multiply
    983.17x = 1,356.78 × 541.15
  4. Step 4: Simplify right side
    983.17x = 734,220.13
  5. Step 5: Solve for x
    x = 734,220.13/983.17
  6. Step 6: Final answer
    x = 746.79

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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.