Home / 1,551.20-2,140.36-961.88

Finding the Fourth Proportional to 1,551.20, 2,140.36 and 961.88

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Solution

The fourth proportional to 1,551.20, 2,140.36 and 961.88 is: 1,327.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.20 : 2,140.36 = 961.88 : x
  2. Step 2: Convert to fraction form
    1,551.20/2,140.36 = 961.88/x
  3. Step 3: Cross multiply
    1,551.20x = 2,140.36 × 961.88
  4. Step 4: Simplify right side
    1,551.20x = 2,058,756.37
  5. Step 5: Solve for x
    x = 2,058,756.37/1,551.20
  6. Step 6: Final answer
    x = 1,327.21

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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.