Home / 2,681.45-4,020.73-831.77

Finding the Fourth Proportional to 2,681.45, 4,020.73 and 831.77

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Solution

The fourth proportional to 2,681.45, 4,020.73 and 831.77 is: 1,247.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,681.45 : 4,020.73 = 831.77 : x
  2. Step 2: Convert to fraction form
    2,681.45/4,020.73 = 831.77/x
  3. Step 3: Cross multiply
    2,681.45x = 4,020.73 × 831.77
  4. Step 4: Simplify right side
    2,681.45x = 3,344,322.59
  5. Step 5: Solve for x
    x = 3,344,322.59/2,681.45
  6. Step 6: Final answer
    x = 1,247.21

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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.