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Finding the Fourth Proportional to 756.56, 1,043.15 and 616.39

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Solution

The fourth proportional to 756.56, 1,043.15 and 616.39 is: 849.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.56 : 1,043.15 = 616.39 : x
  2. Step 2: Convert to fraction form
    756.56/1,043.15 = 616.39/x
  3. Step 3: Cross multiply
    756.56x = 1,043.15 × 616.39
  4. Step 4: Simplify right side
    756.56x = 642,981.54
  5. Step 5: Solve for x
    x = 642,981.54/756.56
  6. Step 6: Final answer
    x = 849.87

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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.