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Finding the Fourth Proportional to 632.09, 947.81 and 221.07

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Solution

The fourth proportional to 632.09, 947.81 and 221.07 is: 331.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.09 : 947.81 = 221.07 : x
  2. Step 2: Convert to fraction form
    632.09/947.81 = 221.07/x
  3. Step 3: Cross multiply
    632.09x = 947.81 × 221.07
  4. Step 4: Simplify right side
    632.09x = 209,531.25
  5. Step 5: Solve for x
    x = 209,531.25/632.09
  6. Step 6: Final answer
    x = 331.49

Related Problems

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Half scale
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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.