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Finding the Fourth Proportional to 845.88, 1,268.92 and 325.76

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Solution

The fourth proportional to 845.88, 1,268.92 and 325.76 is: 488.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.88 : 1,268.92 = 325.76 : x
  2. Step 2: Convert to fraction form
    845.88/1,268.92 = 325.76/x
  3. Step 3: Cross multiply
    845.88x = 1,268.92 × 325.76
  4. Step 4: Simplify right side
    845.88x = 413,363.38
  5. Step 5: Solve for x
    x = 413,363.38/845.88
  6. Step 6: Final answer
    x = 488.68

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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.