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Finding the Fourth Proportional to 439.65, 606.83 and 290.48

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Solution

The fourth proportional to 439.65, 606.83 and 290.48 is: 400.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.65 : 606.83 = 290.48 : x
  2. Step 2: Convert to fraction form
    439.65/606.83 = 290.48/x
  3. Step 3: Cross multiply
    439.65x = 606.83 × 290.48
  4. Step 4: Simplify right side
    439.65x = 176,267.49
  5. Step 5: Solve for x
    x = 176,267.49/439.65
  6. Step 6: Final answer
    x = 400.93

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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.