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Finding the Fourth Proportional to 955.94, 1,319.18 and 563.20

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Solution

The fourth proportional to 955.94, 1,319.18 and 563.20 is: 777.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.94 : 1,319.18 = 563.20 : x
  2. Step 2: Convert to fraction form
    955.94/1,319.18 = 563.20/x
  3. Step 3: Cross multiply
    955.94x = 1,319.18 × 563.20
  4. Step 4: Simplify right side
    955.94x = 742,962.18
  5. Step 5: Solve for x
    x = 742,962.18/955.94
  6. Step 6: Final answer
    x = 777.21

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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.