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Finding the Fourth Proportional to 1,110.36, 1,665.01 and 379.69

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Solution

The fourth proportional to 1,110.36, 1,665.01 and 379.69 is: 569.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.36 : 1,665.01 = 379.69 : x
  2. Step 2: Convert to fraction form
    1,110.36/1,665.01 = 379.69/x
  3. Step 3: Cross multiply
    1,110.36x = 1,665.01 × 379.69
  4. Step 4: Simplify right side
    1,110.36x = 632,181.82
  5. Step 5: Solve for x
    x = 632,181.82/1,110.36
  6. Step 6: Final answer
    x = 569.35

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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.