Home / 1,167.20-1,611.27-831.32

Finding the Fourth Proportional to 1,167.20, 1,611.27 and 831.32

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Solution

The fourth proportional to 1,167.20, 1,611.27 and 831.32 is: 1,147.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.20 : 1,611.27 = 831.32 : x
  2. Step 2: Convert to fraction form
    1,167.20/1,611.27 = 831.32/x
  3. Step 3: Cross multiply
    1,167.20x = 1,611.27 × 831.32
  4. Step 4: Simplify right side
    1,167.20x = 1,339,480.98
  5. Step 5: Solve for x
    x = 1,339,480.98/1,167.20
  6. Step 6: Final answer
    x = 1,147.60

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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.