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Finding the Fourth Proportional to 2,895.53, 4,343.29 and 815.53

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Solution

The fourth proportional to 2,895.53, 4,343.29 and 815.53 is: 1,223.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,895.53 : 4,343.29 = 815.53 : x
  2. Step 2: Convert to fraction form
    2,895.53/4,343.29 = 815.53/x
  3. Step 3: Cross multiply
    2,895.53x = 4,343.29 × 815.53
  4. Step 4: Simplify right side
    2,895.53x = 3,542,083.13
  5. Step 5: Solve for x
    x = 3,542,083.13/2,895.53
  6. Step 6: Final answer
    x = 1,223.30

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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.