Home / 1,550.88-2,140.21-887.72

Finding the Fourth Proportional to 1,550.88, 2,140.21 and 887.72

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Solution

The fourth proportional to 1,550.88, 2,140.21 and 887.72 is: 1,225.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.88 : 2,140.21 = 887.72 : x
  2. Step 2: Convert to fraction form
    1,550.88/2,140.21 = 887.72/x
  3. Step 3: Cross multiply
    1,550.88x = 2,140.21 × 887.72
  4. Step 4: Simplify right side
    1,550.88x = 1,899,907.22
  5. Step 5: Solve for x
    x = 1,899,907.22/1,550.88
  6. Step 6: Final answer
    x = 1,225.05

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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.