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Finding the Fourth Proportional to 479.98, 662.35 and 293.78

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Solution

The fourth proportional to 479.98, 662.35 and 293.78 is: 405.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.98 : 662.35 = 293.78 : x
  2. Step 2: Convert to fraction form
    479.98/662.35 = 293.78/x
  3. Step 3: Cross multiply
    479.98x = 662.35 × 293.78
  4. Step 4: Simplify right side
    479.98x = 194,585.18
  5. Step 5: Solve for x
    x = 194,585.18/479.98
  6. Step 6: Final answer
    x = 405.40

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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.