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Finding the Fourth Proportional to 983.90, 1,476.96 and 673.53

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Solution

The fourth proportional to 983.90, 1,476.96 and 673.53 is: 1,011.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.90 : 1,476.96 = 673.53 : x
  2. Step 2: Convert to fraction form
    983.90/1,476.96 = 673.53/x
  3. Step 3: Cross multiply
    983.90x = 1,476.96 × 673.53
  4. Step 4: Simplify right side
    983.90x = 994,776.87
  5. Step 5: Solve for x
    x = 994,776.87/983.90
  6. Step 6: Final answer
    x = 1,011.05

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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.