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Finding the Fourth Proportional to 1,821.48, 2,730.39 and 725.28

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Solution

The fourth proportional to 1,821.48, 2,730.39 and 725.28 is: 1,087.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.48 : 2,730.39 = 725.28 : x
  2. Step 2: Convert to fraction form
    1,821.48/2,730.39 = 725.28/x
  3. Step 3: Cross multiply
    1,821.48x = 2,730.39 × 725.28
  4. Step 4: Simplify right side
    1,821.48x = 1,980,297.26
  5. Step 5: Solve for x
    x = 1,980,297.26/1,821.48
  6. Step 6: Final answer
    x = 1,087.19

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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.