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Finding the Fourth Proportional to 1,805.80, 2,491.74 and 1,009.02

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Solution

The fourth proportional to 1,805.80, 2,491.74 and 1,009.02 is: 1,392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.80 : 2,491.74 = 1,009.02 : x
  2. Step 2: Convert to fraction form
    1,805.80/2,491.74 = 1,009.02/x
  3. Step 3: Cross multiply
    1,805.80x = 2,491.74 × 1,009.02
  4. Step 4: Simplify right side
    1,805.80x = 2,514,215.49
  5. Step 5: Solve for x
    x = 2,514,215.49/1,805.80
  6. Step 6: Final answer
    x = 1,392.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.