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Finding the Fourth Proportional to 439.80, 607.08 and 292.38

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Solution

The fourth proportional to 439.80, 607.08 and 292.38 is: 403.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.80 : 607.08 = 292.38 : x
  2. Step 2: Convert to fraction form
    439.80/607.08 = 292.38/x
  3. Step 3: Cross multiply
    439.80x = 607.08 × 292.38
  4. Step 4: Simplify right side
    439.80x = 177,498.05
  5. Step 5: Solve for x
    x = 177,498.05/439.80
  6. Step 6: Final answer
    x = 403.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.