Home / 1,590.45-2,196.87-1,221.97

Finding the Fourth Proportional to 1,590.45, 2,196.87 and 1,221.97

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Solution

The fourth proportional to 1,590.45, 2,196.87 and 1,221.97 is: 1,687.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.45 : 2,196.87 = 1,221.97 : x
  2. Step 2: Convert to fraction form
    1,590.45/2,196.87 = 1,221.97/x
  3. Step 3: Cross multiply
    1,590.45x = 2,196.87 × 1,221.97
  4. Step 4: Simplify right side
    1,590.45x = 2,684,492.14
  5. Step 5: Solve for x
    x = 2,684,492.14/1,590.45
  6. Step 6: Final answer
    x = 1,687.88

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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.