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Finding the Fourth Proportional to 439.18, 657.39 and 292.63

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Solution

The fourth proportional to 439.18, 657.39 and 292.63 is: 438.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.18 : 657.39 = 292.63 : x
  2. Step 2: Convert to fraction form
    439.18/657.39 = 292.63/x
  3. Step 3: Cross multiply
    439.18x = 657.39 × 292.63
  4. Step 4: Simplify right side
    439.18x = 192,372.04
  5. Step 5: Solve for x
    x = 192,372.04/439.18
  6. Step 6: Final answer
    x = 438.03

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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.