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Finding the Fourth Proportional to 1,693.28, 2,540.40 and 539.12

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Solution

The fourth proportional to 1,693.28, 2,540.40 and 539.12 is: 808.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,693.28 : 2,540.40 = 539.12 : x
  2. Step 2: Convert to fraction form
    1,693.28/2,540.40 = 539.12/x
  3. Step 3: Cross multiply
    1,693.28x = 2,540.40 × 539.12
  4. Step 4: Simplify right side
    1,693.28x = 1,369,580.45
  5. Step 5: Solve for x
    x = 1,369,580.45/1,693.28
  6. Step 6: Final answer
    x = 808.83

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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.