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Finding the Fourth Proportional to 640.09, 958.86 and 493.33

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Solution

The fourth proportional to 640.09, 958.86 and 493.33 is: 739.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.09 : 958.86 = 493.33 : x
  2. Step 2: Convert to fraction form
    640.09/958.86 = 493.33/x
  3. Step 3: Cross multiply
    640.09x = 958.86 × 493.33
  4. Step 4: Simplify right side
    640.09x = 473,032.01
  5. Step 5: Solve for x
    x = 473,032.01/640.09
  6. Step 6: Final answer
    x = 739.01

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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.