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Finding the Fourth Proportional to 292.78, 438.99 and 190.18

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Solution

The fourth proportional to 292.78, 438.99 and 190.18 is: 285.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.78 : 438.99 = 190.18 : x
  2. Step 2: Convert to fraction form
    292.78/438.99 = 190.18/x
  3. Step 3: Cross multiply
    292.78x = 438.99 × 190.18
  4. Step 4: Simplify right side
    292.78x = 83,487.12
  5. Step 5: Solve for x
    x = 83,487.12/292.78
  6. Step 6: Final answer
    x = 285.15

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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.