Home / 1,831.68-2,528.64-1,311.12

Finding the Fourth Proportional to 1,831.68, 2,528.64 and 1,311.12

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Solution

The fourth proportional to 1,831.68, 2,528.64 and 1,311.12 is: 1,810.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,831.68 : 2,528.64 = 1,311.12 : x
  2. Step 2: Convert to fraction form
    1,831.68/2,528.64 = 1,311.12/x
  3. Step 3: Cross multiply
    1,831.68x = 2,528.64 × 1,311.12
  4. Step 4: Simplify right side
    1,831.68x = 3,315,350.48
  5. Step 5: Solve for x
    x = 3,315,350.48/1,831.68
  6. Step 6: Final answer
    x = 1,810.01

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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.