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Finding the Fourth Proportional to 724.36, 998.96 and 558.16

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Solution

The fourth proportional to 724.36, 998.96 and 558.16 is: 769.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.36 : 998.96 = 558.16 : x
  2. Step 2: Convert to fraction form
    724.36/998.96 = 558.16/x
  3. Step 3: Cross multiply
    724.36x = 998.96 × 558.16
  4. Step 4: Simplify right side
    724.36x = 557,579.51
  5. Step 5: Solve for x
    x = 557,579.51/724.36
  6. Step 6: Final answer
    x = 769.75

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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.