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Finding the Fourth Proportional to 756.18, 1,043.38 and 695.70

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Solution

The fourth proportional to 756.18, 1,043.38 and 695.70 is: 959.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.18 : 1,043.38 = 695.70 : x
  2. Step 2: Convert to fraction form
    756.18/1,043.38 = 695.70/x
  3. Step 3: Cross multiply
    756.18x = 1,043.38 × 695.70
  4. Step 4: Simplify right side
    756.18x = 725,879.47
  5. Step 5: Solve for x
    x = 725,879.47/756.18
  6. Step 6: Final answer
    x = 959.93

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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.