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Finding the Fourth Proportional to 328.81, 493.77 and 315.73

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Solution

The fourth proportional to 328.81, 493.77 and 315.73 is: 474.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.81 : 493.77 = 315.73 : x
  2. Step 2: Convert to fraction form
    328.81/493.77 = 315.73/x
  3. Step 3: Cross multiply
    328.81x = 493.77 × 315.73
  4. Step 4: Simplify right side
    328.81x = 155,898.00
  5. Step 5: Solve for x
    x = 155,898.00/328.81
  6. Step 6: Final answer
    x = 474.13

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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.