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Finding the Fourth Proportional to 810.36, 1,208.61 and 736.92

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Solution

The fourth proportional to 810.36, 1,208.61 and 736.92 is: 1,099.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.36 : 1,208.61 = 736.92 : x
  2. Step 2: Convert to fraction form
    810.36/1,208.61 = 736.92/x
  3. Step 3: Cross multiply
    810.36x = 1,208.61 × 736.92
  4. Step 4: Simplify right side
    810.36x = 890,648.88
  5. Step 5: Solve for x
    x = 890,648.88/810.36
  6. Step 6: Final answer
    x = 1,099.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.