Home / 1,480.47-2,220.70-831.66

Finding the Fourth Proportional to 1,480.47, 2,220.70 and 831.66

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Solution

The fourth proportional to 1,480.47, 2,220.70 and 831.66 is: 1,247.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.47 : 2,220.70 = 831.66 : x
  2. Step 2: Convert to fraction form
    1,480.47/2,220.70 = 831.66/x
  3. Step 3: Cross multiply
    1,480.47x = 2,220.70 × 831.66
  4. Step 4: Simplify right side
    1,480.47x = 1,846,867.36
  5. Step 5: Solve for x
    x = 1,846,867.36/1,480.47
  6. Step 6: Final answer
    x = 1,247.49

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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.