Home / 1,328.80-1,833.66-831.58

Finding the Fourth Proportional to 1,328.80, 1,833.66 and 831.58

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Solution

The fourth proportional to 1,328.80, 1,833.66 and 831.58 is: 1,147.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.80 : 1,833.66 = 831.58 : x
  2. Step 2: Convert to fraction form
    1,328.80/1,833.66 = 831.58/x
  3. Step 3: Cross multiply
    1,328.80x = 1,833.66 × 831.58
  4. Step 4: Simplify right side
    1,328.80x = 1,524,834.98
  5. Step 5: Solve for x
    x = 1,524,834.98/1,328.80
  6. Step 6: Final answer
    x = 1,147.53

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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.