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Finding the Fourth Proportional to 292.45, 438.68 and 109.83

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Solution

The fourth proportional to 292.45, 438.68 and 109.83 is: 164.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.45 : 438.68 = 109.83 : x
  2. Step 2: Convert to fraction form
    292.45/438.68 = 109.83/x
  3. Step 3: Cross multiply
    292.45x = 438.68 × 109.83
  4. Step 4: Simplify right side
    292.45x = 48,180.22
  5. Step 5: Solve for x
    x = 48,180.22/292.45
  6. Step 6: Final answer
    x = 164.75

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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.