Home / 1,220.69-1,831.12-441.15

Finding the Fourth Proportional to 1,220.69, 1,831.12 and 441.15

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Solution

The fourth proportional to 1,220.69, 1,831.12 and 441.15 is: 661.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.69 : 1,831.12 = 441.15 : x
  2. Step 2: Convert to fraction form
    1,220.69/1,831.12 = 441.15/x
  3. Step 3: Cross multiply
    1,220.69x = 1,831.12 × 441.15
  4. Step 4: Simplify right side
    1,220.69x = 807,797.49
  5. Step 5: Solve for x
    x = 807,797.49/1,220.69
  6. Step 6: Final answer
    x = 661.76

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Double scale
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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.