Home / 1,329.08-1,831.74-1,081.22

Finding the Fourth Proportional to 1,329.08, 1,831.74 and 1,081.22

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Solution

The fourth proportional to 1,329.08, 1,831.74 and 1,081.22 is: 1,490.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.08 : 1,831.74 = 1,081.22 : x
  2. Step 2: Convert to fraction form
    1,329.08/1,831.74 = 1,081.22/x
  3. Step 3: Cross multiply
    1,329.08x = 1,831.74 × 1,081.22
  4. Step 4: Simplify right side
    1,329.08x = 1,980,513.92
  5. Step 5: Solve for x
    x = 1,980,513.92/1,329.08
  6. Step 6: Final answer
    x = 1,490.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.