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Finding the Fourth Proportional to 694.89, 958.87 and 400.15

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Solution

The fourth proportional to 694.89, 958.87 and 400.15 is: 552.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.89 : 958.87 = 400.15 : x
  2. Step 2: Convert to fraction form
    694.89/958.87 = 400.15/x
  3. Step 3: Cross multiply
    694.89x = 958.87 × 400.15
  4. Step 4: Simplify right side
    694.89x = 383,693.53
  5. Step 5: Solve for x
    x = 383,693.53/694.89
  6. Step 6: Final answer
    x = 552.16

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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.