Home / 1,581.70-2,185.64-1,371.20

Finding the Fourth Proportional to 1,581.70, 2,185.64 and 1,371.20

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Solution

The fourth proportional to 1,581.70, 2,185.64 and 1,371.20 is: 1,894.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.70 : 2,185.64 = 1,371.20 : x
  2. Step 2: Convert to fraction form
    1,581.70/2,185.64 = 1,371.20/x
  3. Step 3: Cross multiply
    1,581.70x = 2,185.64 × 1,371.20
  4. Step 4: Simplify right side
    1,581.70x = 2,996,938.64
  5. Step 5: Solve for x
    x = 2,996,938.64/1,581.70
  6. Step 6: Final answer
    x = 1,894.76

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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.