Home / 1,905.90-2,630.55-1,109.36

Finding the Fourth Proportional to 1,905.90, 2,630.55 and 1,109.36

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Solution

The fourth proportional to 1,905.90, 2,630.55 and 1,109.36 is: 1,531.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.90 : 2,630.55 = 1,109.36 : x
  2. Step 2: Convert to fraction form
    1,905.90/2,630.55 = 1,109.36/x
  3. Step 3: Cross multiply
    1,905.90x = 2,630.55 × 1,109.36
  4. Step 4: Simplify right side
    1,905.90x = 2,918,213.80
  5. Step 5: Solve for x
    x = 2,918,213.80/1,905.90
  6. Step 6: Final answer
    x = 1,531.15

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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.