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Finding the Fourth Proportional to 354.96, 529.20 and 345.97

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Solution

The fourth proportional to 354.96, 529.20 and 345.97 is: 515.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.96 : 529.20 = 345.97 : x
  2. Step 2: Convert to fraction form
    354.96/529.20 = 345.97/x
  3. Step 3: Cross multiply
    354.96x = 529.20 × 345.97
  4. Step 4: Simplify right side
    354.96x = 183,086.00
  5. Step 5: Solve for x
    x = 183,086.00/354.96
  6. Step 6: Final answer
    x = 515.79

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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.