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Finding the Fourth Proportional to 328.52, 490.15 and 308.81

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Solution

The fourth proportional to 328.52, 490.15 and 308.81 is: 460.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.52 : 490.15 = 308.81 : x
  2. Step 2: Convert to fraction form
    328.52/490.15 = 308.81/x
  3. Step 3: Cross multiply
    328.52x = 490.15 × 308.81
  4. Step 4: Simplify right side
    328.52x = 151,364.83
  5. Step 5: Solve for x
    x = 151,364.83/328.52
  6. Step 6: Final answer
    x = 460.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.