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Finding the Fourth Proportional to 638.06, 957.08 and 330.01

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Solution

The fourth proportional to 638.06, 957.08 and 330.01 is: 495.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.06 : 957.08 = 330.01 : x
  2. Step 2: Convert to fraction form
    638.06/957.08 = 330.01/x
  3. Step 3: Cross multiply
    638.06x = 957.08 × 330.01
  4. Step 4: Simplify right side
    638.06x = 315,844.40
  5. Step 5: Solve for x
    x = 315,844.40/638.06
  6. Step 6: Final answer
    x = 495.01

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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.