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Finding the Fourth Proportional to 983.06, 1,474.41 and 280.32

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Solution

The fourth proportional to 983.06, 1,474.41 and 280.32 is: 420.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.06 : 1,474.41 = 280.32 : x
  2. Step 2: Convert to fraction form
    983.06/1,474.41 = 280.32/x
  3. Step 3: Cross multiply
    983.06x = 1,474.41 × 280.32
  4. Step 4: Simplify right side
    983.06x = 413,302.13
  5. Step 5: Solve for x
    x = 413,302.13/983.06
  6. Step 6: Final answer
    x = 420.42

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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.