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Finding the Fourth Proportional to 292.67, 438.90 and 100.25

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Solution

The fourth proportional to 292.67, 438.90 and 100.25 is: 150.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.67 : 438.90 = 100.25 : x
  2. Step 2: Convert to fraction form
    292.67/438.90 = 100.25/x
  3. Step 3: Cross multiply
    292.67x = 438.90 × 100.25
  4. Step 4: Simplify right side
    292.67x = 43,999.73
  5. Step 5: Solve for x
    x = 43,999.73/292.67
  6. Step 6: Final answer
    x = 150.34

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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.