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Finding the Fourth Proportional to 642.76, 886.93 and 363.03

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Solution

The fourth proportional to 642.76, 886.93 and 363.03 is: 500.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.76 : 886.93 = 363.03 : x
  2. Step 2: Convert to fraction form
    642.76/886.93 = 363.03/x
  3. Step 3: Cross multiply
    642.76x = 886.93 × 363.03
  4. Step 4: Simplify right side
    642.76x = 321,982.20
  5. Step 5: Solve for x
    x = 321,982.20/642.76
  6. Step 6: Final answer
    x = 500.94

Related Problems

Find fourth proportional to 321.38, 443.47 and 181.52
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.