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Finding the Fourth Proportional to 1,109.48, 1,664.22 and 379.06

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Solution

The fourth proportional to 1,109.48, 1,664.22 and 379.06 is: 568.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.48 : 1,664.22 = 379.06 : x
  2. Step 2: Convert to fraction form
    1,109.48/1,664.22 = 379.06/x
  3. Step 3: Cross multiply
    1,109.48x = 1,664.22 × 379.06
  4. Step 4: Simplify right side
    1,109.48x = 630,838.29
  5. Step 5: Solve for x
    x = 630,838.29/1,109.48
  6. Step 6: Final answer
    x = 568.59

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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.