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Finding the Fourth Proportional to 325.20, 484.37 and 318.45

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Solution

The fourth proportional to 325.20, 484.37 and 318.45 is: 474.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.20 : 484.37 = 318.45 : x
  2. Step 2: Convert to fraction form
    325.20/484.37 = 318.45/x
  3. Step 3: Cross multiply
    325.20x = 484.37 × 318.45
  4. Step 4: Simplify right side
    325.20x = 154,248.42
  5. Step 5: Solve for x
    x = 154,248.42/325.20
  6. Step 6: Final answer
    x = 474.32

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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.