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Finding the Fourth Proportional to 983.09, 1,356.28 and 563.22

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Solution

The fourth proportional to 983.09, 1,356.28 and 563.22 is: 777.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.09 : 1,356.28 = 563.22 : x
  2. Step 2: Convert to fraction form
    983.09/1,356.28 = 563.22/x
  3. Step 3: Cross multiply
    983.09x = 1,356.28 × 563.22
  4. Step 4: Simplify right side
    983.09x = 763,877.24
  5. Step 5: Solve for x
    x = 763,877.24/983.09
  6. Step 6: Final answer
    x = 777.02

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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.