Home / 2,128.69-3,192.90-741.70

Finding the Fourth Proportional to 2,128.69, 3,192.90 and 741.70

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Solution

The fourth proportional to 2,128.69, 3,192.90 and 741.70 is: 1,112.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.69 : 3,192.90 = 741.70 : x
  2. Step 2: Convert to fraction form
    2,128.69/3,192.90 = 741.70/x
  3. Step 3: Cross multiply
    2,128.69x = 3,192.90 × 741.70
  4. Step 4: Simplify right side
    2,128.69x = 2,368,173.93
  5. Step 5: Solve for x
    x = 2,368,173.93/2,128.69
  6. Step 6: Final answer
    x = 1,112.50

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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.