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Finding the Fourth Proportional to 328.61, 492.91 and 123.27

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Solution

The fourth proportional to 328.61, 492.91 and 123.27 is: 184.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.61 : 492.91 = 123.27 : x
  2. Step 2: Convert to fraction form
    328.61/492.91 = 123.27/x
  3. Step 3: Cross multiply
    328.61x = 492.91 × 123.27
  4. Step 4: Simplify right side
    328.61x = 60,760.71
  5. Step 5: Solve for x
    x = 60,760.71/328.61
  6. Step 6: Final answer
    x = 184.91

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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.