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Finding the Fourth Proportional to 630.80, 946.19 and 220.22

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Solution

The fourth proportional to 630.80, 946.19 and 220.22 is: 330.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.80 : 946.19 = 220.22 : x
  2. Step 2: Convert to fraction form
    630.80/946.19 = 220.22/x
  3. Step 3: Cross multiply
    630.80x = 946.19 × 220.22
  4. Step 4: Simplify right side
    630.80x = 208,364.13
  5. Step 5: Solve for x
    x = 208,364.13/630.80
  6. Step 6: Final answer
    x = 330.32

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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.