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Finding the Fourth Proportional to 806.50, 1,113.51 and 496.54

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Solution

The fourth proportional to 806.50, 1,113.51 and 496.54 is: 685.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.50 : 1,113.51 = 496.54 : x
  2. Step 2: Convert to fraction form
    806.50/1,113.51 = 496.54/x
  3. Step 3: Cross multiply
    806.50x = 1,113.51 × 496.54
  4. Step 4: Simplify right side
    806.50x = 552,902.26
  5. Step 5: Solve for x
    x = 552,902.26/806.50
  6. Step 6: Final answer
    x = 685.56

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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.