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Finding the Fourth Proportional to 641.91, 962.95 and 208.96

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Solution

The fourth proportional to 641.91, 962.95 and 208.96 is: 313.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.91 : 962.95 = 208.96 : x
  2. Step 2: Convert to fraction form
    641.91/962.95 = 208.96/x
  3. Step 3: Cross multiply
    641.91x = 962.95 × 208.96
  4. Step 4: Simplify right side
    641.91x = 201,217.51
  5. Step 5: Solve for x
    x = 201,217.51/641.91
  6. Step 6: Final answer
    x = 313.47

Related Problems

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Double scale
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Similar ratio
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1.5x scale

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.