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Finding the Fourth Proportional to 623.69, 935.05 and 330.81

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Solution

The fourth proportional to 623.69, 935.05 and 330.81 is: 495.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.69 : 935.05 = 330.81 : x
  2. Step 2: Convert to fraction form
    623.69/935.05 = 330.81/x
  3. Step 3: Cross multiply
    623.69x = 935.05 × 330.81
  4. Step 4: Simplify right side
    623.69x = 309,323.89
  5. Step 5: Solve for x
    x = 309,323.89/623.69
  6. Step 6: Final answer
    x = 495.96

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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.