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Finding the Fourth Proportional to 842.46, 1,261.26 and 567.60

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Solution

The fourth proportional to 842.46, 1,261.26 and 567.60 is: 849.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.46 : 1,261.26 = 567.60 : x
  2. Step 2: Convert to fraction form
    842.46/1,261.26 = 567.60/x
  3. Step 3: Cross multiply
    842.46x = 1,261.26 × 567.60
  4. Step 4: Simplify right side
    842.46x = 715,891.18
  5. Step 5: Solve for x
    x = 715,891.18/842.46
  6. Step 6: Final answer
    x = 849.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.