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Finding the Fourth Proportional to 955.76, 1,319.12 and 563

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Solution

The fourth proportional to 955.76, 1,319.12 and 563 is: 777.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.76 : 1,319.12 = 563 : x
  2. Step 2: Convert to fraction form
    955.76/1,319.12 = 563/x
  3. Step 3: Cross multiply
    955.76x = 1,319.12 × 563
  4. Step 4: Simplify right side
    955.76x = 742,664.56
  5. Step 5: Solve for x
    x = 742,664.56/955.76
  6. Step 6: Final answer
    x = 777.04

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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.