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Finding the Fourth Proportional to 724.94, 999.74 and 558.89

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Solution

The fourth proportional to 724.94, 999.74 and 558.89 is: 770.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.94 : 999.74 = 558.89 : x
  2. Step 2: Convert to fraction form
    724.94/999.74 = 558.89/x
  3. Step 3: Cross multiply
    724.94x = 999.74 × 558.89
  4. Step 4: Simplify right side
    724.94x = 558,744.69
  5. Step 5: Solve for x
    x = 558,744.69/724.94
  6. Step 6: Final answer
    x = 770.75

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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.