Home / 2,219.21-3,327.85-831.58

Finding the Fourth Proportional to 2,219.21, 3,327.85 and 831.58

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Solution

The fourth proportional to 2,219.21, 3,327.85 and 831.58 is: 1,247.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.21 : 3,327.85 = 831.58 : x
  2. Step 2: Convert to fraction form
    2,219.21/3,327.85 = 831.58/x
  3. Step 3: Cross multiply
    2,219.21x = 3,327.85 × 831.58
  4. Step 4: Simplify right side
    2,219.21x = 2,767,363.10
  5. Step 5: Solve for x
    x = 2,767,363.10/2,219.21
  6. Step 6: Final answer
    x = 1,247.00

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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.