Home / 428,513.76-642,678.24-270,531.36

Finding the Fourth Proportional to 428,513.76, 642,678.24 and 270,531.36

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Solution

The fourth proportional to 428,513.76, 642,678.24 and 270,531.36 is: 405,738.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,513.76 : 642,678.24 = 270,531.36 : x
  2. Step 2: Convert to fraction form
    428,513.76/642,678.24 = 270,531.36/x
  3. Step 3: Cross multiply
    428,513.76x = 642,678.24 × 270,531.36
  4. Step 4: Simplify right side
    428,513.76x = 173,864,618,309.61
  5. Step 5: Solve for x
    x = 173,864,618,309.61/428,513.76
  6. Step 6: Final answer
    x = 405,738.71

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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.