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Finding the Fourth Proportional to 1,821.72, 2,733.06 and 726.12

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Solution

The fourth proportional to 1,821.72, 2,733.06 and 726.12 is: 1,089.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.72 : 2,733.06 = 726.12 : x
  2. Step 2: Convert to fraction form
    1,821.72/2,733.06 = 726.12/x
  3. Step 3: Cross multiply
    1,821.72x = 2,733.06 × 726.12
  4. Step 4: Simplify right side
    1,821.72x = 1,984,529.53
  5. Step 5: Solve for x
    x = 1,984,529.53/1,821.72
  6. Step 6: Final answer
    x = 1,089.37

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1.5x scale

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.