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Finding the Fourth Proportional to 320.67, 479.75 and 269.01

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Solution

The fourth proportional to 320.67, 479.75 and 269.01 is: 402.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.67 : 479.75 = 269.01 : x
  2. Step 2: Convert to fraction form
    320.67/479.75 = 269.01/x
  3. Step 3: Cross multiply
    320.67x = 479.75 × 269.01
  4. Step 4: Simplify right side
    320.67x = 129,056.20
  5. Step 5: Solve for x
    x = 129,056.20/320.67
  6. Step 6: Final answer
    x = 402.46

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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.