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Finding the Fourth Proportional to 439.70, 607.02 and 414.80

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Solution

The fourth proportional to 439.70, 607.02 and 414.80 is: 572.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.70 : 607.02 = 414.80 : x
  2. Step 2: Convert to fraction form
    439.70/607.02 = 414.80/x
  3. Step 3: Cross multiply
    439.70x = 607.02 × 414.80
  4. Step 4: Simplify right side
    439.70x = 251,791.90
  5. Step 5: Solve for x
    x = 251,791.90/439.70
  6. Step 6: Final answer
    x = 572.64

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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.