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Finding the Fourth Proportional to 640.04, 960.06 and 423.58

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Solution

The fourth proportional to 640.04, 960.06 and 423.58 is: 635.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.04 : 960.06 = 423.58 : x
  2. Step 2: Convert to fraction form
    640.04/960.06 = 423.58/x
  3. Step 3: Cross multiply
    640.04x = 960.06 × 423.58
  4. Step 4: Simplify right side
    640.04x = 406,662.21
  5. Step 5: Solve for x
    x = 406,662.21/640.04
  6. Step 6: Final answer
    x = 635.37

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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.