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Finding the Fourth Proportional to 5,287.48, 7,928.90 and 2,821.74

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Solution

The fourth proportional to 5,287.48, 7,928.90 and 2,821.74 is: 4,231.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.48 : 7,928.90 = 2,821.74 : x
  2. Step 2: Convert to fraction form
    5,287.48/7,928.90 = 2,821.74/x
  3. Step 3: Cross multiply
    5,287.48x = 7,928.90 × 2,821.74
  4. Step 4: Simplify right side
    5,287.48x = 22,373,294.29
  5. Step 5: Solve for x
    x = 22,373,294.29/5,287.48
  6. Step 6: Final answer
    x = 4,231.37

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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.