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Finding the Fourth Proportional to 640.15, 958.86 and 366.10

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Solution

The fourth proportional to 640.15, 958.86 and 366.10 is: 548.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.15 : 958.86 = 366.10 : x
  2. Step 2: Convert to fraction form
    640.15/958.86 = 366.10/x
  3. Step 3: Cross multiply
    640.15x = 958.86 × 366.10
  4. Step 4: Simplify right side
    640.15x = 351,038.65
  5. Step 5: Solve for x
    x = 351,038.65/640.15
  6. Step 6: Final answer
    x = 548.37

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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.