Home / 1,551.12-2,139.94-887.62

Finding the Fourth Proportional to 1,551.12, 2,139.94 and 887.62

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Solution

The fourth proportional to 1,551.12, 2,139.94 and 887.62 is: 1,224.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.12 : 2,139.94 = 887.62 : x
  2. Step 2: Convert to fraction form
    1,551.12/2,139.94 = 887.62/x
  3. Step 3: Cross multiply
    1,551.12x = 2,139.94 × 887.62
  4. Step 4: Simplify right side
    1,551.12x = 1,899,453.54
  5. Step 5: Solve for x
    x = 1,899,453.54/1,551.12
  6. Step 6: Final answer
    x = 1,224.57

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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.