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Finding the Fourth Proportional to 724.69, 999.39 and 558.64

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Solution

The fourth proportional to 724.69, 999.39 and 558.64 is: 770.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.69 : 999.39 = 558.64 : x
  2. Step 2: Convert to fraction form
    724.69/999.39 = 558.64/x
  3. Step 3: Cross multiply
    724.69x = 999.39 × 558.64
  4. Step 4: Simplify right side
    724.69x = 558,296.73
  5. Step 5: Solve for x
    x = 558,296.73/724.69
  6. Step 6: Final answer
    x = 770.40

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Double scale
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1.5x scale

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.