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Finding the Fourth Proportional to 641.47, 961.32 and 293.94

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Solution

The fourth proportional to 641.47, 961.32 and 293.94 is: 440.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.47 : 961.32 = 293.94 : x
  2. Step 2: Convert to fraction form
    641.47/961.32 = 293.94/x
  3. Step 3: Cross multiply
    641.47x = 961.32 × 293.94
  4. Step 4: Simplify right side
    641.47x = 282,570.40
  5. Step 5: Solve for x
    x = 282,570.40/641.47
  6. Step 6: Final answer
    x = 440.50

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Double scale
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Similar ratio
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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.