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Finding the Fourth Proportional to 351.50, 527.40 and 189.20

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Solution

The fourth proportional to 351.50, 527.40 and 189.20 is: 283.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.50 : 527.40 = 189.20 : x
  2. Step 2: Convert to fraction form
    351.50/527.40 = 189.20/x
  3. Step 3: Cross multiply
    351.50x = 527.40 × 189.20
  4. Step 4: Simplify right side
    351.50x = 99,785.40
  5. Step 5: Solve for x
    x = 99,785.40/351.50
  6. Step 6: Final answer
    x = 283.89

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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.