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Finding the Fourth Proportional to 1,160, 1,600.80 and 694.72

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Solution

The fourth proportional to 1,160, 1,600.80 and 694.72 is: 958.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,160 : 1,600.80 = 694.72 : x
  2. Step 2: Convert to fraction form
    1,160/1,600.80 = 694.72/x
  3. Step 3: Cross multiply
    1,160x = 1,600.80 × 694.72
  4. Step 4: Simplify right side
    1,160x = 1,112,107.78
  5. Step 5: Solve for x
    x = 1,112,107.78/1,160
  6. Step 6: Final answer
    x = 958.71

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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.