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Finding the Fourth Proportional to 487.24, 673.90 and 479.04

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Solution

The fourth proportional to 487.24, 673.90 and 479.04 is: 662.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.24 : 673.90 = 479.04 : x
  2. Step 2: Convert to fraction form
    487.24/673.90 = 479.04/x
  3. Step 3: Cross multiply
    487.24x = 673.90 × 479.04
  4. Step 4: Simplify right side
    487.24x = 322,825.06
  5. Step 5: Solve for x
    x = 322,825.06/487.24
  6. Step 6: Final answer
    x = 662.56

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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.