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Finding the Fourth Proportional to 842.71, 1,261.63 and 567.85

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Solution

The fourth proportional to 842.71, 1,261.63 and 567.85 is: 850.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.71 : 1,261.63 = 567.85 : x
  2. Step 2: Convert to fraction form
    842.71/1,261.63 = 567.85/x
  3. Step 3: Cross multiply
    842.71x = 1,261.63 × 567.85
  4. Step 4: Simplify right side
    842.71x = 716,416.60
  5. Step 5: Solve for x
    x = 716,416.60/842.71
  6. Step 6: Final answer
    x = 850.13

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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.