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Finding the Fourth Proportional to 439.74, 606.90 and 253.23

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Solution

The fourth proportional to 439.74, 606.90 and 253.23 is: 349.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.74 : 606.90 = 253.23 : x
  2. Step 2: Convert to fraction form
    439.74/606.90 = 253.23/x
  3. Step 3: Cross multiply
    439.74x = 606.90 × 253.23
  4. Step 4: Simplify right side
    439.74x = 153,684.02
  5. Step 5: Solve for x
    x = 153,684.02/439.74
  6. Step 6: Final answer
    x = 349.49

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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.