Home / 1,440.51-2,160.36-747.15

Finding the Fourth Proportional to 1,440.51, 2,160.36 and 747.15

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Solution

The fourth proportional to 1,440.51, 2,160.36 and 747.15 is: 1,120.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.51 : 2,160.36 = 747.15 : x
  2. Step 2: Convert to fraction form
    1,440.51/2,160.36 = 747.15/x
  3. Step 3: Cross multiply
    1,440.51x = 2,160.36 × 747.15
  4. Step 4: Simplify right side
    1,440.51x = 1,614,112.97
  5. Step 5: Solve for x
    x = 1,614,112.97/1,440.51
  6. Step 6: Final answer
    x = 1,120.51

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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.