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Finding the Fourth Proportional to 641.44, 962.16 and 230.56

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Solution

The fourth proportional to 641.44, 962.16 and 230.56 is: 345.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.44 : 962.16 = 230.56 : x
  2. Step 2: Convert to fraction form
    641.44/962.16 = 230.56/x
  3. Step 3: Cross multiply
    641.44x = 962.16 × 230.56
  4. Step 4: Simplify right side
    641.44x = 221,835.61
  5. Step 5: Solve for x
    x = 221,835.61/641.44
  6. Step 6: Final answer
    x = 345.84

Related Problems

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Half scale
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Double scale
Find fourth proportional to 642.44, 963.66 and 231.56
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.