Home / 428,628.31-642,942.46-144,295.07

Finding the Fourth Proportional to 428,628.31, 642,942.46 and 144,295.07

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Solution

The fourth proportional to 428,628.31, 642,942.46 and 144,295.07 is: 216,442.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,628.31 : 642,942.46 = 144,295.07 : x
  2. Step 2: Convert to fraction form
    428,628.31/642,942.46 = 144,295.07/x
  3. Step 3: Cross multiply
    428,628.31x = 642,942.46 × 144,295.07
  4. Step 4: Simplify right side
    428,628.31x = 92,773,427,853.88
  5. Step 5: Solve for x
    x = 92,773,427,853.88/428,628.31
  6. Step 6: Final answer
    x = 216,442.61

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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.