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Finding the Fourth Proportional to 631.50, 946.20 and 220.41

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Solution

The fourth proportional to 631.50, 946.20 and 220.41 is: 330.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.50 : 946.20 = 220.41 : x
  2. Step 2: Convert to fraction form
    631.50/946.20 = 220.41/x
  3. Step 3: Cross multiply
    631.50x = 946.20 × 220.41
  4. Step 4: Simplify right side
    631.50x = 208,551.94
  5. Step 5: Solve for x
    x = 208,551.94/631.50
  6. Step 6: Final answer
    x = 330.25

Related Problems

Find fourth proportional to 315.75, 473.10 and 110.21
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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.