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Finding the Fourth Proportional to 1,915.11, 2,872.67 and 528.29

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Solution

The fourth proportional to 1,915.11, 2,872.67 and 528.29 is: 792.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.11 : 2,872.67 = 528.29 : x
  2. Step 2: Convert to fraction form
    1,915.11/2,872.67 = 528.29/x
  3. Step 3: Cross multiply
    1,915.11x = 2,872.67 × 528.29
  4. Step 4: Simplify right side
    1,915.11x = 1,517,596.60
  5. Step 5: Solve for x
    x = 1,517,596.60/1,915.11
  6. Step 6: Final answer
    x = 792.43

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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.