Home / 1,110.30-1,665.45-905.10

Finding the Fourth Proportional to 1,110.30, 1,665.45 and 905.10

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Solution

The fourth proportional to 1,110.30, 1,665.45 and 905.10 is: 1,357.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.30 : 1,665.45 = 905.10 : x
  2. Step 2: Convert to fraction form
    1,110.30/1,665.45 = 905.10/x
  3. Step 3: Cross multiply
    1,110.30x = 1,665.45 × 905.10
  4. Step 4: Simplify right side
    1,110.30x = 1,507,398.80
  5. Step 5: Solve for x
    x = 1,507,398.80/1,110.30
  6. Step 6: Final answer
    x = 1,357.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.