Home / 428,252.20-642,328.62-112,733.71

Finding the Fourth Proportional to 428,252.20, 642,328.62 and 112,733.71

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Solution

The fourth proportional to 428,252.20, 642,328.62 and 112,733.71 is: 169,087.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,252.20 : 642,328.62 = 112,733.71 : x
  2. Step 2: Convert to fraction form
    428,252.20/642,328.62 = 112,733.71/x
  3. Step 3: Cross multiply
    428,252.20x = 642,328.62 × 112,733.71
  4. Step 4: Simplify right side
    428,252.20x = 72,412,086,343.21
  5. Step 5: Solve for x
    x = 72,412,086,343.21/428,252.20
  6. Step 6: Final answer
    x = 169,087.48

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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.