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Finding the Fourth Proportional to 630.49, 945.43 and 219.65

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Solution

The fourth proportional to 630.49, 945.43 and 219.65 is: 329.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.49 : 945.43 = 219.65 : x
  2. Step 2: Convert to fraction form
    630.49/945.43 = 219.65/x
  3. Step 3: Cross multiply
    630.49x = 945.43 × 219.65
  4. Step 4: Simplify right side
    630.49x = 207,663.70
  5. Step 5: Solve for x
    x = 207,663.70/630.49
  6. Step 6: Final answer
    x = 329.37

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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.