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Finding the Fourth Proportional to 983.46, 1,474.41 and 654.38

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Solution

The fourth proportional to 983.46, 1,474.41 and 654.38 is: 981.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.46 : 1,474.41 = 654.38 : x
  2. Step 2: Convert to fraction form
    983.46/1,474.41 = 654.38/x
  3. Step 3: Cross multiply
    983.46x = 1,474.41 × 654.38
  4. Step 4: Simplify right side
    983.46x = 964,823.19
  5. Step 5: Solve for x
    x = 964,823.19/983.46
  6. Step 6: Final answer
    x = 981.05

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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.