Home / 428,280.80-642,129.60-162,001.40

Finding the Fourth Proportional to 428,280.80, 642,129.60 and 162,001.40

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Solution

The fourth proportional to 428,280.80, 642,129.60 and 162,001.40 is: 242,891.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,280.80 : 642,129.60 = 162,001.40 : x
  2. Step 2: Convert to fraction form
    428,280.80/642,129.60 = 162,001.40/x
  3. Step 3: Cross multiply
    428,280.80x = 642,129.60 × 162,001.40
  4. Step 4: Simplify right side
    428,280.80x = 104,025,894,181.44
  5. Step 5: Solve for x
    x = 104,025,894,181.44/428,280.80
  6. Step 6: Final answer
    x = 242,891.80

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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.