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Finding the Fourth Proportional to 640.92, 963.02 and 623.08

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Solution

The fourth proportional to 640.92, 963.02 and 623.08 is: 936.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.92 : 963.02 = 623.08 : x
  2. Step 2: Convert to fraction form
    640.92/963.02 = 623.08/x
  3. Step 3: Cross multiply
    640.92x = 963.02 × 623.08
  4. Step 4: Simplify right side
    640.92x = 600,038.50
  5. Step 5: Solve for x
    x = 600,038.50/640.92
  6. Step 6: Final answer
    x = 936.21

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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.