Home / 1,110.28-1,665.61-379.69

Finding the Fourth Proportional to 1,110.28, 1,665.61 and 379.69

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Solution

The fourth proportional to 1,110.28, 1,665.61 and 379.69 is: 569.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.28 : 1,665.61 = 379.69 : x
  2. Step 2: Convert to fraction form
    1,110.28/1,665.61 = 379.69/x
  3. Step 3: Cross multiply
    1,110.28x = 1,665.61 × 379.69
  4. Step 4: Simplify right side
    1,110.28x = 632,412.48
  5. Step 5: Solve for x
    x = 632,412.48/1,110.28
  6. Step 6: Final answer
    x = 569.60

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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.