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Finding the Fourth Proportional to 439.64, 606.68 and 253.14

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Solution

The fourth proportional to 439.64, 606.68 and 253.14 is: 349.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.64 : 606.68 = 253.14 : x
  2. Step 2: Convert to fraction form
    439.64/606.68 = 253.14/x
  3. Step 3: Cross multiply
    439.64x = 606.68 × 253.14
  4. Step 4: Simplify right side
    439.64x = 153,572.57
  5. Step 5: Solve for x
    x = 153,572.57/439.64
  6. Step 6: Final answer
    x = 349.31

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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.