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Finding the Fourth Proportional to 807.55, 1,114.03 and 559.21

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Solution

The fourth proportional to 807.55, 1,114.03 and 559.21 is: 771.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.55 : 1,114.03 = 559.21 : x
  2. Step 2: Convert to fraction form
    807.55/1,114.03 = 559.21/x
  3. Step 3: Cross multiply
    807.55x = 1,114.03 × 559.21
  4. Step 4: Simplify right side
    807.55x = 622,976.72
  5. Step 5: Solve for x
    x = 622,976.72/807.55
  6. Step 6: Final answer
    x = 771.44

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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.