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Finding the Fourth Proportional to 694.70, 958.81 and 528.66

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Solution

The fourth proportional to 694.70, 958.81 and 528.66 is: 729.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.70 : 958.81 = 528.66 : x
  2. Step 2: Convert to fraction form
    694.70/958.81 = 528.66/x
  3. Step 3: Cross multiply
    694.70x = 958.81 × 528.66
  4. Step 4: Simplify right side
    694.70x = 506,884.49
  5. Step 5: Solve for x
    x = 506,884.49/694.70
  6. Step 6: Final answer
    x = 729.65

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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.