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Finding the Fourth Proportional to 428,670.44, 642,999.18 and 179,352.44

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Solution

The fourth proportional to 428,670.44, 642,999.18 and 179,352.44 is: 269,025.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,670.44 : 642,999.18 = 179,352.44 : x
  2. Step 2: Convert to fraction form
    428,670.44/642,999.18 = 179,352.44/x
  3. Step 3: Cross multiply
    428,670.44x = 642,999.18 × 179,352.44
  4. Step 4: Simplify right side
    428,670.44x = 115,323,471,851.00
  5. Step 5: Solve for x
    x = 115,323,471,851.00/428,670.44
  6. Step 6: Final answer
    x = 269,025.95

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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.