Home / 2,831.40-4,247.37-1,187.64

Finding the Fourth Proportional to 2,831.40, 4,247.37 and 1,187.64

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Solution

The fourth proportional to 2,831.40, 4,247.37 and 1,187.64 is: 1,781.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.40 : 4,247.37 = 1,187.64 : x
  2. Step 2: Convert to fraction form
    2,831.40/4,247.37 = 1,187.64/x
  3. Step 3: Cross multiply
    2,831.40x = 4,247.37 × 1,187.64
  4. Step 4: Simplify right side
    2,831.40x = 5,044,346.51
  5. Step 5: Solve for x
    x = 5,044,346.51/2,831.40
  6. Step 6: Final answer
    x = 1,781.57

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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.