Home / 1,571.69-2,169.13-942.21

Finding the Fourth Proportional to 1,571.69, 2,169.13 and 942.21

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Solution

The fourth proportional to 1,571.69, 2,169.13 and 942.21 is: 1,300.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.69 : 2,169.13 = 942.21 : x
  2. Step 2: Convert to fraction form
    1,571.69/2,169.13 = 942.21/x
  3. Step 3: Cross multiply
    1,571.69x = 2,169.13 × 942.21
  4. Step 4: Simplify right side
    1,571.69x = 2,043,775.98
  5. Step 5: Solve for x
    x = 2,043,775.98/1,571.69
  6. Step 6: Final answer
    x = 1,300.37

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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.