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Finding the Fourth Proportional to 439.34, 606.08 and 290.12

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Solution

The fourth proportional to 439.34, 606.08 and 290.12 is: 400.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.34 : 606.08 = 290.12 : x
  2. Step 2: Convert to fraction form
    439.34/606.08 = 290.12/x
  3. Step 3: Cross multiply
    439.34x = 606.08 × 290.12
  4. Step 4: Simplify right side
    439.34x = 175,831.45
  5. Step 5: Solve for x
    x = 175,831.45/439.34
  6. Step 6: Final answer
    x = 400.22

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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.