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Finding the Fourth Proportional to 724.28, 998.93 and 488.16

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Solution

The fourth proportional to 724.28, 998.93 and 488.16 is: 673.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.28 : 998.93 = 488.16 : x
  2. Step 2: Convert to fraction form
    724.28/998.93 = 488.16/x
  3. Step 3: Cross multiply
    724.28x = 998.93 × 488.16
  4. Step 4: Simplify right side
    724.28x = 487,638.89
  5. Step 5: Solve for x
    x = 487,638.89/724.28
  6. Step 6: Final answer
    x = 673.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.