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Finding the Fourth Proportional to 2,724.78, 4,087.17 and 993

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Solution

The fourth proportional to 2,724.78, 4,087.17 and 993 is: 1,489.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,724.78 : 4,087.17 = 993 : x
  2. Step 2: Convert to fraction form
    2,724.78/4,087.17 = 993/x
  3. Step 3: Cross multiply
    2,724.78x = 4,087.17 × 993
  4. Step 4: Simplify right side
    2,724.78x = 4,058,559.81
  5. Step 5: Solve for x
    x = 4,058,559.81/2,724.78
  6. Step 6: Final answer
    x = 1,489.50

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.