Home / 1,512.24-2,268.32-781.40

Finding the Fourth Proportional to 1,512.24, 2,268.32 and 781.40

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Solution

The fourth proportional to 1,512.24, 2,268.32 and 781.40 is: 1,172.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512.24 : 2,268.32 = 781.40 : x
  2. Step 2: Convert to fraction form
    1,512.24/2,268.32 = 781.40/x
  3. Step 3: Cross multiply
    1,512.24x = 2,268.32 × 781.40
  4. Step 4: Simplify right side
    1,512.24x = 1,772,450.00
  5. Step 5: Solve for x
    x = 1,772,450.00/1,512.24
  6. Step 6: Final answer
    x = 1,172.07

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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.