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Finding the Fourth Proportional to 439.52, 606.72 and 315.23

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Solution

The fourth proportional to 439.52, 606.72 and 315.23 is: 435.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.52 : 606.72 = 315.23 : x
  2. Step 2: Convert to fraction form
    439.52/606.72 = 315.23/x
  3. Step 3: Cross multiply
    439.52x = 606.72 × 315.23
  4. Step 4: Simplify right side
    439.52x = 191,253.31
  5. Step 5: Solve for x
    x = 191,253.31/439.52
  6. Step 6: Final answer
    x = 435.15

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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.