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Finding the Fourth Proportional to 1,699.52, 2,549.34 and 809.87

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Solution

The fourth proportional to 1,699.52, 2,549.34 and 809.87 is: 1,214.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,699.52 : 2,549.34 = 809.87 : x
  2. Step 2: Convert to fraction form
    1,699.52/2,549.34 = 809.87/x
  3. Step 3: Cross multiply
    1,699.52x = 2,549.34 × 809.87
  4. Step 4: Simplify right side
    1,699.52x = 2,064,621.24
  5. Step 5: Solve for x
    x = 2,064,621.24/1,699.52
  6. Step 6: Final answer
    x = 1,214.83

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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.