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Finding the Fourth Proportional to 354.24, 488.32 and 284.20

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Solution

The fourth proportional to 354.24, 488.32 and 284.20 is: 391.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.24 : 488.32 = 284.20 : x
  2. Step 2: Convert to fraction form
    354.24/488.32 = 284.20/x
  3. Step 3: Cross multiply
    354.24x = 488.32 × 284.20
  4. Step 4: Simplify right side
    354.24x = 138,780.54
  5. Step 5: Solve for x
    x = 138,780.54/354.24
  6. Step 6: Final answer
    x = 391.77

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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.