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Finding the Fourth Proportional to 5,724.50, 7,899.81 and 3,240.50

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Solution

The fourth proportional to 5,724.50, 7,899.81 and 3,240.50 is: 4,471.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,724.50 : 7,899.81 = 3,240.50 : x
  2. Step 2: Convert to fraction form
    5,724.50/7,899.81 = 3,240.50/x
  3. Step 3: Cross multiply
    5,724.50x = 7,899.81 × 3,240.50
  4. Step 4: Simplify right side
    5,724.50x = 25,599,334.31
  5. Step 5: Solve for x
    x = 25,599,334.31/5,724.50
  6. Step 6: Final answer
    x = 4,471.89

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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.