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Finding the Fourth Proportional to 2,389.70, 3,297.12 and 1,550.44

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Solution

The fourth proportional to 2,389.70, 3,297.12 and 1,550.44 is: 2,139.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.70 : 3,297.12 = 1,550.44 : x
  2. Step 2: Convert to fraction form
    2,389.70/3,297.12 = 1,550.44/x
  3. Step 3: Cross multiply
    2,389.70x = 3,297.12 × 1,550.44
  4. Step 4: Simplify right side
    2,389.70x = 5,111,986.73
  5. Step 5: Solve for x
    x = 5,111,986.73/2,389.70
  6. Step 6: Final answer
    x = 2,139.18

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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.