Home / 428,814.20-643,252.28-113,267

Finding the Fourth Proportional to 428,814.20, 643,252.28 and 113,267

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Solution

The fourth proportional to 428,814.20, 643,252.28 and 113,267 is: 169,908.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,814.20 : 643,252.28 = 113,267 : x
  2. Step 2: Convert to fraction form
    428,814.20/643,252.28 = 113,267/x
  3. Step 3: Cross multiply
    428,814.20x = 643,252.28 × 113,267
  4. Step 4: Simplify right side
    428,814.20x = 72,859,255,998.76
  5. Step 5: Solve for x
    x = 72,859,255,998.76/428,814.20
  6. Step 6: Final answer
    x = 169,908.68

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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.