Home / 1,221.08-1,831.74-451.40

Finding the Fourth Proportional to 1,221.08, 1,831.74 and 451.40

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Solution

The fourth proportional to 1,221.08, 1,831.74 and 451.40 is: 677.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.08 : 1,831.74 = 451.40 : x
  2. Step 2: Convert to fraction form
    1,221.08/1,831.74 = 451.40/x
  3. Step 3: Cross multiply
    1,221.08x = 1,831.74 × 451.40
  4. Step 4: Simplify right side
    1,221.08x = 826,847.44
  5. Step 5: Solve for x
    x = 826,847.44/1,221.08
  6. Step 6: Final answer
    x = 677.14

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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.