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Finding the Fourth Proportional to 439.48, 607 and 404.38

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Solution

The fourth proportional to 439.48, 607 and 404.38 is: 558.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.48 : 607 = 404.38 : x
  2. Step 2: Convert to fraction form
    439.48/607 = 404.38/x
  3. Step 3: Cross multiply
    439.48x = 607 × 404.38
  4. Step 4: Simplify right side
    439.48x = 245,458.66
  5. Step 5: Solve for x
    x = 245,458.66/439.48
  6. Step 6: Final answer
    x = 558.52

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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.