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Finding the Fourth Proportional to 2,259.91, 3,389.79 and 1,090

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Solution

The fourth proportional to 2,259.91, 3,389.79 and 1,090 is: 1,634.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,259.91 : 3,389.79 = 1,090 : x
  2. Step 2: Convert to fraction form
    2,259.91/3,389.79 = 1,090/x
  3. Step 3: Cross multiply
    2,259.91x = 3,389.79 × 1,090
  4. Step 4: Simplify right side
    2,259.91x = 3,694,871.10
  5. Step 5: Solve for x
    x = 3,694,871.10/2,259.91
  6. Step 6: Final answer
    x = 1,634.96

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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.