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Finding the Fourth Proportional to 641.39, 884.52 and 481.23

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Solution

The fourth proportional to 641.39, 884.52 and 481.23 is: 663.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.39 : 884.52 = 481.23 : x
  2. Step 2: Convert to fraction form
    641.39/884.52 = 481.23/x
  3. Step 3: Cross multiply
    641.39x = 884.52 × 481.23
  4. Step 4: Simplify right side
    641.39x = 425,657.56
  5. Step 5: Solve for x
    x = 425,657.56/641.39
  6. Step 6: Final answer
    x = 663.65

Related Problems

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Half scale
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Double scale
Find fourth proportional to 642.39, 885.90 and 482.23
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.