Home / 1,221.31-1,831.98-441.55

Finding the Fourth Proportional to 1,221.31, 1,831.98 and 441.55

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Solution

The fourth proportional to 1,221.31, 1,831.98 and 441.55 is: 662.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.31 : 1,831.98 = 441.55 : x
  2. Step 2: Convert to fraction form
    1,221.31/1,831.98 = 441.55/x
  3. Step 3: Cross multiply
    1,221.31x = 1,831.98 × 441.55
  4. Step 4: Simplify right side
    1,221.31x = 808,914.71
  5. Step 5: Solve for x
    x = 808,914.71/1,221.31
  6. Step 6: Final answer
    x = 662.33

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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.