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Finding the Fourth Proportional to 983.11, 1,474.65 and 397.95

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Solution

The fourth proportional to 983.11, 1,474.65 and 397.95 is: 596.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.11 : 1,474.65 = 397.95 : x
  2. Step 2: Convert to fraction form
    983.11/1,474.65 = 397.95/x
  3. Step 3: Cross multiply
    983.11x = 1,474.65 × 397.95
  4. Step 4: Simplify right side
    983.11x = 586,834.98
  5. Step 5: Solve for x
    x = 586,834.98/983.11
  6. Step 6: Final answer
    x = 596.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.