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Finding the Fourth Proportional to 810.30, 1,213.08 and 731.94

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Solution

The fourth proportional to 810.30, 1,213.08 and 731.94 is: 1,095.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.30 : 1,213.08 = 731.94 : x
  2. Step 2: Convert to fraction form
    810.30/1,213.08 = 731.94/x
  3. Step 3: Cross multiply
    810.30x = 1,213.08 × 731.94
  4. Step 4: Simplify right side
    810.30x = 887,894.48
  5. Step 5: Solve for x
    x = 887,894.48/810.30
  6. Step 6: Final answer
    x = 1,095.76

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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.