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Finding the Fourth Proportional to 328.44, 493.26 and 315.39

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Solution

The fourth proportional to 328.44, 493.26 and 315.39 is: 473.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.44 : 493.26 = 315.39 : x
  2. Step 2: Convert to fraction form
    328.44/493.26 = 315.39/x
  3. Step 3: Cross multiply
    328.44x = 493.26 × 315.39
  4. Step 4: Simplify right side
    328.44x = 155,569.27
  5. Step 5: Solve for x
    x = 155,569.27/328.44
  6. Step 6: Final answer
    x = 473.66

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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.