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Finding the Fourth Proportional to 694.85, 959.18 and 628.16

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Solution

The fourth proportional to 694.85, 959.18 and 628.16 is: 867.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.85 : 959.18 = 628.16 : x
  2. Step 2: Convert to fraction form
    694.85/959.18 = 628.16/x
  3. Step 3: Cross multiply
    694.85x = 959.18 × 628.16
  4. Step 4: Simplify right side
    694.85x = 602,510.57
  5. Step 5: Solve for x
    x = 602,510.57/694.85
  6. Step 6: Final answer
    x = 867.12

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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.