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Finding the Fourth Proportional to 641.49, 962.55 and 230.72

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Solution

The fourth proportional to 641.49, 962.55 and 230.72 is: 346.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.49 : 962.55 = 230.72 : x
  2. Step 2: Convert to fraction form
    641.49/962.55 = 230.72/x
  3. Step 3: Cross multiply
    641.49x = 962.55 × 230.72
  4. Step 4: Simplify right side
    641.49x = 222,074.72
  5. Step 5: Solve for x
    x = 222,074.72/641.49
  6. Step 6: Final answer
    x = 346.19

Related Problems

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Half scale
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Double scale
Find fourth proportional to 642.49, 964.05 and 231.72
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.