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Finding the Fourth Proportional to 983.97, 1,476.36 and 551.12

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Solution

The fourth proportional to 983.97, 1,476.36 and 551.12 is: 826.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.97 : 1,476.36 = 551.12 : x
  2. Step 2: Convert to fraction form
    983.97/1,476.36 = 551.12/x
  3. Step 3: Cross multiply
    983.97x = 1,476.36 × 551.12
  4. Step 4: Simplify right side
    983.97x = 813,644.14
  5. Step 5: Solve for x
    x = 813,644.14/983.97
  6. Step 6: Final answer
    x = 826.90

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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.