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Finding the Fourth Proportional to 319.64, 478.92 and 262.04

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Solution

The fourth proportional to 319.64, 478.92 and 262.04 is: 392.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.64 : 478.92 = 262.04 : x
  2. Step 2: Convert to fraction form
    319.64/478.92 = 262.04/x
  3. Step 3: Cross multiply
    319.64x = 478.92 × 262.04
  4. Step 4: Simplify right side
    319.64x = 125,496.20
  5. Step 5: Solve for x
    x = 125,496.20/319.64
  6. Step 6: Final answer
    x = 392.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.