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Finding the Fourth Proportional to 693.25, 956.69 and 398.55

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Solution

The fourth proportional to 693.25, 956.69 and 398.55 is: 550.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.25 : 956.69 = 398.55 : x
  2. Step 2: Convert to fraction form
    693.25/956.69 = 398.55/x
  3. Step 3: Cross multiply
    693.25x = 956.69 × 398.55
  4. Step 4: Simplify right side
    693.25x = 381,286.81
  5. Step 5: Solve for x
    x = 381,286.81/693.25
  6. Step 6: Final answer
    x = 550.00

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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.