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Finding the Fourth Proportional to 640.44, 961.47 and 606.42

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Solution

The fourth proportional to 640.44, 961.47 and 606.42 is: 910.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.44 : 961.47 = 606.42 : x
  2. Step 2: Convert to fraction form
    640.44/961.47 = 606.42/x
  3. Step 3: Cross multiply
    640.44x = 961.47 × 606.42
  4. Step 4: Simplify right side
    640.44x = 583,054.64
  5. Step 5: Solve for x
    x = 583,054.64/640.44
  6. Step 6: Final answer
    x = 910.40

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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.