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Finding the Fourth Proportional to 344.01, 515.38 and 189.71

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Solution

The fourth proportional to 344.01, 515.38 and 189.71 is: 284.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.01 : 515.38 = 189.71 : x
  2. Step 2: Convert to fraction form
    344.01/515.38 = 189.71/x
  3. Step 3: Cross multiply
    344.01x = 515.38 × 189.71
  4. Step 4: Simplify right side
    344.01x = 97,772.74
  5. Step 5: Solve for x
    x = 97,772.74/344.01
  6. Step 6: Final answer
    x = 284.21

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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.