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Finding the Fourth Proportional to 630.28, 945.38 and 386.84

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Solution

The fourth proportional to 630.28, 945.38 and 386.84 is: 580.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.28 : 945.38 = 386.84 : x
  2. Step 2: Convert to fraction form
    630.28/945.38 = 386.84/x
  3. Step 3: Cross multiply
    630.28x = 945.38 × 386.84
  4. Step 4: Simplify right side
    630.28x = 365,710.80
  5. Step 5: Solve for x
    x = 365,710.80/630.28
  6. Step 6: Final answer
    x = 580.24

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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.