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Finding the Fourth Proportional to 640.59, 960.07 and 275.01

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Solution

The fourth proportional to 640.59, 960.07 and 275.01 is: 412.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.59 : 960.07 = 275.01 : x
  2. Step 2: Convert to fraction form
    640.59/960.07 = 275.01/x
  3. Step 3: Cross multiply
    640.59x = 960.07 × 275.01
  4. Step 4: Simplify right side
    640.59x = 264,028.85
  5. Step 5: Solve for x
    x = 264,028.85/640.59
  6. Step 6: Final answer
    x = 412.17

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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.