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Finding the Fourth Proportional to 328.92, 493.32 and 155.52

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Solution

The fourth proportional to 328.92, 493.32 and 155.52 is: 233.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.92 : 493.32 = 155.52 : x
  2. Step 2: Convert to fraction form
    328.92/493.32 = 155.52/x
  3. Step 3: Cross multiply
    328.92x = 493.32 × 155.52
  4. Step 4: Simplify right side
    328.92x = 76,721.13
  5. Step 5: Solve for x
    x = 76,721.13/328.92
  6. Step 6: Final answer
    x = 233.25

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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.