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Finding the Fourth Proportional to 1,085.80, 1,498.80 and 726.97

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Solution

The fourth proportional to 1,085.80, 1,498.80 and 726.97 is: 1,003.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.80 : 1,498.80 = 726.97 : x
  2. Step 2: Convert to fraction form
    1,085.80/1,498.80 = 726.97/x
  3. Step 3: Cross multiply
    1,085.80x = 1,498.80 × 726.97
  4. Step 4: Simplify right side
    1,085.80x = 1,089,582.64
  5. Step 5: Solve for x
    x = 1,089,582.64/1,085.80
  6. Step 6: Final answer
    x = 1,003.48

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1.5x scale

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.