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Finding the Fourth Proportional to 982.63, 1,356.11 and 563.12

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Solution

The fourth proportional to 982.63, 1,356.11 and 563.12 is: 777.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.63 : 1,356.11 = 563.12 : x
  2. Step 2: Convert to fraction form
    982.63/1,356.11 = 563.12/x
  3. Step 3: Cross multiply
    982.63x = 1,356.11 × 563.12
  4. Step 4: Simplify right side
    982.63x = 763,650.26
  5. Step 5: Solve for x
    x = 763,650.26/982.63
  6. Step 6: Final answer
    x = 777.15

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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.