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Finding the Fourth Proportional to 641.67, 962.62 and 203.03

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Solution

The fourth proportional to 641.67, 962.62 and 203.03 is: 304.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.67 : 962.62 = 203.03 : x
  2. Step 2: Convert to fraction form
    641.67/962.62 = 203.03/x
  3. Step 3: Cross multiply
    641.67x = 962.62 × 203.03
  4. Step 4: Simplify right side
    641.67x = 195,438.43
  5. Step 5: Solve for x
    x = 195,438.43/641.67
  6. Step 6: Final answer
    x = 304.58

Related Problems

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Double scale
Find fourth proportional to 642.67, 964.12 and 204.03
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.