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Finding the Fourth Proportional to 1,110.33, 1,666.23 and 720.51

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Solution

The fourth proportional to 1,110.33, 1,666.23 and 720.51 is: 1,081.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.33 : 1,666.23 = 720.51 : x
  2. Step 2: Convert to fraction form
    1,110.33/1,666.23 = 720.51/x
  3. Step 3: Cross multiply
    1,110.33x = 1,666.23 × 720.51
  4. Step 4: Simplify right side
    1,110.33x = 1,200,535.38
  5. Step 5: Solve for x
    x = 1,200,535.38/1,110.33
  6. Step 6: Final answer
    x = 1,081.24

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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.