Home / 1,581.30-2,181.87-1,207.62

Finding the Fourth Proportional to 1,581.30, 2,181.87 and 1,207.62

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Solution

The fourth proportional to 1,581.30, 2,181.87 and 1,207.62 is: 1,666.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.30 : 2,181.87 = 1,207.62 : x
  2. Step 2: Convert to fraction form
    1,581.30/2,181.87 = 1,207.62/x
  3. Step 3: Cross multiply
    1,581.30x = 2,181.87 × 1,207.62
  4. Step 4: Simplify right side
    1,581.30x = 2,634,869.85
  5. Step 5: Solve for x
    x = 2,634,869.85/1,581.30
  6. Step 6: Final answer
    x = 1,666.27

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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.