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Finding the Fourth Proportional to 479.23, 660.03 and 442.78

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Solution

The fourth proportional to 479.23, 660.03 and 442.78 is: 609.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.23 : 660.03 = 442.78 : x
  2. Step 2: Convert to fraction form
    479.23/660.03 = 442.78/x
  3. Step 3: Cross multiply
    479.23x = 660.03 × 442.78
  4. Step 4: Simplify right side
    479.23x = 292,242.57
  5. Step 5: Solve for x
    x = 292,242.57/479.23
  6. Step 6: Final answer
    x = 609.82

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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.