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Finding the Fourth Proportional to 806.33, 1,113.27 and 718.85

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Solution

The fourth proportional to 806.33, 1,113.27 and 718.85 is: 992.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.33 : 1,113.27 = 718.85 : x
  2. Step 2: Convert to fraction form
    806.33/1,113.27 = 718.85/x
  3. Step 3: Cross multiply
    806.33x = 1,113.27 × 718.85
  4. Step 4: Simplify right side
    806.33x = 800,274.14
  5. Step 5: Solve for x
    x = 800,274.14/806.33
  6. Step 6: Final answer
    x = 992.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.