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Finding the Fourth Proportional to 346.71, 519.92 and 127.28

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Solution

The fourth proportional to 346.71, 519.92 and 127.28 is: 190.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.71 : 519.92 = 127.28 : x
  2. Step 2: Convert to fraction form
    346.71/519.92 = 127.28/x
  3. Step 3: Cross multiply
    346.71x = 519.92 × 127.28
  4. Step 4: Simplify right side
    346.71x = 66,176.92
  5. Step 5: Solve for x
    x = 66,176.92/346.71
  6. Step 6: Final answer
    x = 190.87

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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.