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Finding the Fourth Proportional to 493.49, 740.27 and 128.27

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Solution

The fourth proportional to 493.49, 740.27 and 128.27 is: 192.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.49 : 740.27 = 128.27 : x
  2. Step 2: Convert to fraction form
    493.49/740.27 = 128.27/x
  3. Step 3: Cross multiply
    493.49x = 740.27 × 128.27
  4. Step 4: Simplify right side
    493.49x = 94,954.43
  5. Step 5: Solve for x
    x = 94,954.43/493.49
  6. Step 6: Final answer
    x = 192.41

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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.