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Finding the Fourth Proportional to 877.89, 1,317.17 and 531.48

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Solution

The fourth proportional to 877.89, 1,317.17 and 531.48 is: 797.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.89 : 1,317.17 = 531.48 : x
  2. Step 2: Convert to fraction form
    877.89/1,317.17 = 531.48/x
  3. Step 3: Cross multiply
    877.89x = 1,317.17 × 531.48
  4. Step 4: Simplify right side
    877.89x = 700,050.84
  5. Step 5: Solve for x
    x = 700,050.84/877.89
  6. Step 6: Final answer
    x = 797.42

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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.