Home / 1,228.05-1,831.99-1,139.66

Finding the Fourth Proportional to 1,228.05, 1,831.99 and 1,139.66

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Solution

The fourth proportional to 1,228.05, 1,831.99 and 1,139.66 is: 1,700.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.05 : 1,831.99 = 1,139.66 : x
  2. Step 2: Convert to fraction form
    1,228.05/1,831.99 = 1,139.66/x
  3. Step 3: Cross multiply
    1,228.05x = 1,831.99 × 1,139.66
  4. Step 4: Simplify right side
    1,228.05x = 2,087,845.72
  5. Step 5: Solve for x
    x = 2,087,845.72/1,228.05
  6. Step 6: Final answer
    x = 1,700.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.