Home / 1,416.92-2,121.57-831.44

Finding the Fourth Proportional to 1,416.92, 2,121.57 and 831.44

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Solution

The fourth proportional to 1,416.92, 2,121.57 and 831.44 is: 1,244.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.92 : 2,121.57 = 831.44 : x
  2. Step 2: Convert to fraction form
    1,416.92/2,121.57 = 831.44/x
  3. Step 3: Cross multiply
    1,416.92x = 2,121.57 × 831.44
  4. Step 4: Simplify right side
    1,416.92x = 1,763,958.16
  5. Step 5: Solve for x
    x = 1,763,958.16/1,416.92
  6. Step 6: Final answer
    x = 1,244.92

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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.