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Finding the Fourth Proportional to 872.40, 1,308.51 and 295.26

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Solution

The fourth proportional to 872.40, 1,308.51 and 295.26 is: 442.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.40 : 1,308.51 = 295.26 : x
  2. Step 2: Convert to fraction form
    872.40/1,308.51 = 295.26/x
  3. Step 3: Cross multiply
    872.40x = 1,308.51 × 295.26
  4. Step 4: Simplify right side
    872.40x = 386,350.66
  5. Step 5: Solve for x
    x = 386,350.66/872.40
  6. Step 6: Final answer
    x = 442.86

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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.