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Finding the Fourth Proportional to 439.36, 606.56 and 284.16

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Solution

The fourth proportional to 439.36, 606.56 and 284.16 is: 392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.36 : 606.56 = 284.16 : x
  2. Step 2: Convert to fraction form
    439.36/606.56 = 284.16/x
  3. Step 3: Cross multiply
    439.36x = 606.56 × 284.16
  4. Step 4: Simplify right side
    439.36x = 172,360.09
  5. Step 5: Solve for x
    x = 172,360.09/439.36
  6. Step 6: Final answer
    x = 392.30

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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.