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Finding the Fourth Proportional to 492.86, 739.29 and 127.64

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Solution

The fourth proportional to 492.86, 739.29 and 127.64 is: 191.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.86 : 739.29 = 127.64 : x
  2. Step 2: Convert to fraction form
    492.86/739.29 = 127.64/x
  3. Step 3: Cross multiply
    492.86x = 739.29 × 127.64
  4. Step 4: Simplify right side
    492.86x = 94,359.28
  5. Step 5: Solve for x
    x = 94,359.28/492.86
  6. Step 6: Final answer
    x = 191.45

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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.