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Finding the Fourth Proportional to 756.86, 1,043.01 and 617.33

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Solution

The fourth proportional to 756.86, 1,043.01 and 617.33 is: 850.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.86 : 1,043.01 = 617.33 : x
  2. Step 2: Convert to fraction form
    756.86/1,043.01 = 617.33/x
  3. Step 3: Cross multiply
    756.86x = 1,043.01 × 617.33
  4. Step 4: Simplify right side
    756.86x = 643,883.97
  5. Step 5: Solve for x
    x = 643,883.97/756.86
  6. Step 6: Final answer
    x = 850.74

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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.