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Finding the Fourth Proportional to 1,821.52, 2,732.30 and 523

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Solution

The fourth proportional to 1,821.52, 2,732.30 and 523 is: 784.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.52 : 2,732.30 = 523 : x
  2. Step 2: Convert to fraction form
    1,821.52/2,732.30 = 523/x
  3. Step 3: Cross multiply
    1,821.52x = 2,732.30 × 523
  4. Step 4: Simplify right side
    1,821.52x = 1,428,992.90
  5. Step 5: Solve for x
    x = 1,428,992.90/1,821.52
  6. Step 6: Final answer
    x = 784.51

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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.