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Finding the Fourth Proportional to 640, 958.98 and 273.94

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Solution

The fourth proportional to 640, 958.98 and 273.94 is: 410.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    640 : 958.98 = 273.94 : x
  2. Step 2: Convert to fraction form
    640/958.98 = 273.94/x
  3. Step 3: Cross multiply
    640x = 958.98 × 273.94
  4. Step 4: Simplify right side
    640x = 262,702.98
  5. Step 5: Solve for x
    x = 262,702.98/640
  6. Step 6: Final answer
    x = 410.47

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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.