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Finding the Fourth Proportional to 871.97, 1,308.14 and 433.46

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Solution

The fourth proportional to 871.97, 1,308.14 and 433.46 is: 650.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.97 : 1,308.14 = 433.46 : x
  2. Step 2: Convert to fraction form
    871.97/1,308.14 = 433.46/x
  3. Step 3: Cross multiply
    871.97x = 1,308.14 × 433.46
  4. Step 4: Simplify right side
    871.97x = 567,019.82
  5. Step 5: Solve for x
    x = 567,019.82/871.97
  6. Step 6: Final answer
    x = 650.28

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1.5x scale

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.