Home / 428,224.25-642,126.19-211,832.97

Finding the Fourth Proportional to 428,224.25, 642,126.19 and 211,832.97

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Solution

The fourth proportional to 428,224.25, 642,126.19 and 211,832.97 is: 317,645.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,224.25 : 642,126.19 = 211,832.97 : x
  2. Step 2: Convert to fraction form
    428,224.25/642,126.19 = 211,832.97/x
  3. Step 3: Cross multiply
    428,224.25x = 642,126.19 × 211,832.97
  4. Step 4: Simplify right side
    428,224.25x = 136,023,495,402.12
  5. Step 5: Solve for x
    x = 136,023,495,402.12/428,224.25
  6. Step 6: Final answer
    x = 317,645.47

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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.