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Finding the Fourth Proportional to 630.42, 945.70 and 219.46

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Solution

The fourth proportional to 630.42, 945.70 and 219.46 is: 329.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.42 : 945.70 = 219.46 : x
  2. Step 2: Convert to fraction form
    630.42/945.70 = 219.46/x
  3. Step 3: Cross multiply
    630.42x = 945.70 × 219.46
  4. Step 4: Simplify right side
    630.42x = 207,543.32
  5. Step 5: Solve for x
    x = 207,543.32/630.42
  6. Step 6: Final answer
    x = 329.21

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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.