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Finding the Fourth Proportional to 1,709.28, 2,563.92 and 539.28

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Solution

The fourth proportional to 1,709.28, 2,563.92 and 539.28 is: 808.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,709.28 : 2,563.92 = 539.28 : x
  2. Step 2: Convert to fraction form
    1,709.28/2,563.92 = 539.28/x
  3. Step 3: Cross multiply
    1,709.28x = 2,563.92 × 539.28
  4. Step 4: Simplify right side
    1,709.28x = 1,382,670.78
  5. Step 5: Solve for x
    x = 1,382,670.78/1,709.28
  6. Step 6: Final answer
    x = 808.92

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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.