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Finding the Fourth Proportional to 631.34, 946.80 and 220.38

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Solution

The fourth proportional to 631.34, 946.80 and 220.38 is: 330.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.34 : 946.80 = 220.38 : x
  2. Step 2: Convert to fraction form
    631.34/946.80 = 220.38/x
  3. Step 3: Cross multiply
    631.34x = 946.80 × 220.38
  4. Step 4: Simplify right side
    631.34x = 208,655.78
  5. Step 5: Solve for x
    x = 208,655.78/631.34
  6. Step 6: Final answer
    x = 330.50

Related Problems

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Half scale
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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.