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Finding the Fourth Proportional to 810.96, 1,213.92 and 537.36

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Solution

The fourth proportional to 810.96, 1,213.92 and 537.36 is: 804.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.96 : 1,213.92 = 537.36 : x
  2. Step 2: Convert to fraction form
    810.96/1,213.92 = 537.36/x
  3. Step 3: Cross multiply
    810.96x = 1,213.92 × 537.36
  4. Step 4: Simplify right side
    810.96x = 652,312.05
  5. Step 5: Solve for x
    x = 652,312.05/810.96
  6. Step 6: Final answer
    x = 804.37

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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.