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Finding the Fourth Proportional to 630.56, 943.92 and 486.56

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Solution

The fourth proportional to 630.56, 943.92 and 486.56 is: 728.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.56 : 943.92 = 486.56 : x
  2. Step 2: Convert to fraction form
    630.56/943.92 = 486.56/x
  3. Step 3: Cross multiply
    630.56x = 943.92 × 486.56
  4. Step 4: Simplify right side
    630.56x = 459,273.72
  5. Step 5: Solve for x
    x = 459,273.72/630.56
  6. Step 6: Final answer
    x = 728.36

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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.