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Finding the Fourth Proportional to 354.02, 528.98 and 215.97

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Solution

The fourth proportional to 354.02, 528.98 and 215.97 is: 322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.02 : 528.98 = 215.97 : x
  2. Step 2: Convert to fraction form
    354.02/528.98 = 215.97/x
  3. Step 3: Cross multiply
    354.02x = 528.98 × 215.97
  4. Step 4: Simplify right side
    354.02x = 114,241.96
  5. Step 5: Solve for x
    x = 114,241.96/354.02
  6. Step 6: Final answer
    x = 322.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.