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Finding the Fourth Proportional to 2,389.42, 3,297.42 and 1,327.21

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Solution

The fourth proportional to 2,389.42, 3,297.42 and 1,327.21 is: 1,831.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.42 : 3,297.42 = 1,327.21 : x
  2. Step 2: Convert to fraction form
    2,389.42/3,297.42 = 1,327.21/x
  3. Step 3: Cross multiply
    2,389.42x = 3,297.42 × 1,327.21
  4. Step 4: Simplify right side
    2,389.42x = 4,376,368.80
  5. Step 5: Solve for x
    x = 4,376,368.80/2,389.42
  6. Step 6: Final answer
    x = 1,831.56

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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.