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Finding the Fourth Proportional to 3,524.79, 5,287.79 and 1,215.75

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Solution

The fourth proportional to 3,524.79, 5,287.79 and 1,215.75 is: 1,823.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,524.79 : 5,287.79 = 1,215.75 : x
  2. Step 2: Convert to fraction form
    3,524.79/5,287.79 = 1,215.75/x
  3. Step 3: Cross multiply
    3,524.79x = 5,287.79 × 1,215.75
  4. Step 4: Simplify right side
    3,524.79x = 6,428,624.61
  5. Step 5: Solve for x
    x = 6,428,624.61/3,524.79
  6. Step 6: Final answer
    x = 1,823.83

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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.