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Finding the Fourth Proportional to 1,726.11, 2,382 and 980.06

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Solution

The fourth proportional to 1,726.11, 2,382 and 980.06 is: 1,352.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,726.11 : 2,382 = 980.06 : x
  2. Step 2: Convert to fraction form
    1,726.11/2,382 = 980.06/x
  3. Step 3: Cross multiply
    1,726.11x = 2,382 × 980.06
  4. Step 4: Simplify right side
    1,726.11x = 2,334,491.01
  5. Step 5: Solve for x
    x = 2,334,491.01/1,726.11
  6. Step 6: Final answer
    x = 1,352.46

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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.