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Finding the Fourth Proportional to 621.06, 856.80 and 481.02

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Solution

The fourth proportional to 621.06, 856.80 and 481.02 is: 663.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.06 : 856.80 = 481.02 : x
  2. Step 2: Convert to fraction form
    621.06/856.80 = 481.02/x
  3. Step 3: Cross multiply
    621.06x = 856.80 × 481.02
  4. Step 4: Simplify right side
    621.06x = 412,137.94
  5. Step 5: Solve for x
    x = 412,137.94/621.06
  6. Step 6: Final answer
    x = 663.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.