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Finding the Fourth Proportional to 983.62, 1,474.21 and 496.81

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Solution

The fourth proportional to 983.62, 1,474.21 and 496.81 is: 744.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.62 : 1,474.21 = 496.81 : x
  2. Step 2: Convert to fraction form
    983.62/1,474.21 = 496.81/x
  3. Step 3: Cross multiply
    983.62x = 1,474.21 × 496.81
  4. Step 4: Simplify right side
    983.62x = 732,397.34
  5. Step 5: Solve for x
    x = 732,397.34/983.62
  6. Step 6: Final answer
    x = 744.60

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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.