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Finding the Fourth Proportional to 439.69, 606.77 and 253.17

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Solution

The fourth proportional to 439.69, 606.77 and 253.17 is: 349.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.69 : 606.77 = 253.17 : x
  2. Step 2: Convert to fraction form
    439.69/606.77 = 253.17/x
  3. Step 3: Cross multiply
    439.69x = 606.77 × 253.17
  4. Step 4: Simplify right side
    439.69x = 153,617.35
  5. Step 5: Solve for x
    x = 153,617.35/439.69
  6. Step 6: Final answer
    x = 349.38

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Double scale
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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.