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Finding the Fourth Proportional to 1,109.85, 1,664.73 and 379.01

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Solution

The fourth proportional to 1,109.85, 1,664.73 and 379.01 is: 568.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.85 : 1,664.73 = 379.01 : x
  2. Step 2: Convert to fraction form
    1,109.85/1,664.73 = 379.01/x
  3. Step 3: Cross multiply
    1,109.85x = 1,664.73 × 379.01
  4. Step 4: Simplify right side
    1,109.85x = 630,949.32
  5. Step 5: Solve for x
    x = 630,949.32/1,109.85
  6. Step 6: Final answer
    x = 568.50

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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.