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Finding the Fourth Proportional to 854.53, 1,179.29 and 522.90

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Solution

The fourth proportional to 854.53, 1,179.29 and 522.90 is: 721.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.53 : 1,179.29 = 522.90 : x
  2. Step 2: Convert to fraction form
    854.53/1,179.29 = 522.90/x
  3. Step 3: Cross multiply
    854.53x = 1,179.29 × 522.90
  4. Step 4: Simplify right side
    854.53x = 616,652.05
  5. Step 5: Solve for x
    x = 616,652.05/854.53
  6. Step 6: Final answer
    x = 721.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.