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Finding the Fourth Proportional to 724.36, 999.18 and 625.18

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Solution

The fourth proportional to 724.36, 999.18 and 625.18 is: 862.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.36 : 999.18 = 625.18 : x
  2. Step 2: Convert to fraction form
    724.36/999.18 = 625.18/x
  3. Step 3: Cross multiply
    724.36x = 999.18 × 625.18
  4. Step 4: Simplify right side
    724.36x = 624,667.35
  5. Step 5: Solve for x
    x = 624,667.35/724.36
  6. Step 6: Final answer
    x = 862.37

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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.