Home / 1,690.22-2,331.96-1,100.90

Finding the Fourth Proportional to 1,690.22, 2,331.96 and 1,100.90

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Solution

The fourth proportional to 1,690.22, 2,331.96 and 1,100.90 is: 1,518.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.22 : 2,331.96 = 1,100.90 : x
  2. Step 2: Convert to fraction form
    1,690.22/2,331.96 = 1,100.90/x
  3. Step 3: Cross multiply
    1,690.22x = 2,331.96 × 1,100.90
  4. Step 4: Simplify right side
    1,690.22x = 2,567,254.76
  5. Step 5: Solve for x
    x = 2,567,254.76/1,690.22
  6. Step 6: Final answer
    x = 1,518.89

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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.