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Finding the Fourth Proportional to 320.01, 478.99 and 262.09

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Solution

The fourth proportional to 320.01, 478.99 and 262.09 is: 392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.01 : 478.99 = 262.09 : x
  2. Step 2: Convert to fraction form
    320.01/478.99 = 262.09/x
  3. Step 3: Cross multiply
    320.01x = 478.99 × 262.09
  4. Step 4: Simplify right side
    320.01x = 125,538.49
  5. Step 5: Solve for x
    x = 125,538.49/320.01
  6. Step 6: Final answer
    x = 392.30

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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.