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Finding the Fourth Proportional to 698.52, 963.96 and 383.81

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Solution

The fourth proportional to 698.52, 963.96 and 383.81 is: 529.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.52 : 963.96 = 383.81 : x
  2. Step 2: Convert to fraction form
    698.52/963.96 = 383.81/x
  3. Step 3: Cross multiply
    698.52x = 963.96 × 383.81
  4. Step 4: Simplify right side
    698.52x = 369,972.67
  5. Step 5: Solve for x
    x = 369,972.67/698.52
  6. Step 6: Final answer
    x = 529.66

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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.