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Finding the Fourth Proportional to 351.49, 527.63 and 189.49

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Solution

The fourth proportional to 351.49, 527.63 and 189.49 is: 284.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.49 : 527.63 = 189.49 : x
  2. Step 2: Convert to fraction form
    351.49/527.63 = 189.49/x
  3. Step 3: Cross multiply
    351.49x = 527.63 × 189.49
  4. Step 4: Simplify right side
    351.49x = 99,980.61
  5. Step 5: Solve for x
    x = 99,980.61/351.49
  6. Step 6: Final answer
    x = 284.45

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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.