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Finding the Fourth Proportional to 495.81, 684.14 and 330.30

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Solution

The fourth proportional to 495.81, 684.14 and 330.30 is: 455.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.81 : 684.14 = 330.30 : x
  2. Step 2: Convert to fraction form
    495.81/684.14 = 330.30/x
  3. Step 3: Cross multiply
    495.81x = 684.14 × 330.30
  4. Step 4: Simplify right side
    495.81x = 225,969.79
  5. Step 5: Solve for x
    x = 225,969.79/495.81
  6. Step 6: Final answer
    x = 455.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.