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Finding the Fourth Proportional to 877.33, 1,315.98 and 261.04

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Solution

The fourth proportional to 877.33, 1,315.98 and 261.04 is: 391.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.33 : 1,315.98 = 261.04 : x
  2. Step 2: Convert to fraction form
    877.33/1,315.98 = 261.04/x
  3. Step 3: Cross multiply
    877.33x = 1,315.98 × 261.04
  4. Step 4: Simplify right side
    877.33x = 343,523.70
  5. Step 5: Solve for x
    x = 343,523.70/877.33
  6. Step 6: Final answer
    x = 391.56

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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.