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Finding the Fourth Proportional to 643,018.72, 887,376.48 and 356,550.88

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Solution

The fourth proportional to 643,018.72, 887,376.48 and 356,550.88 is: 492,046.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,018.72 : 887,376.48 = 356,550.88 : x
  2. Step 2: Convert to fraction form
    643,018.72/887,376.48 = 356,550.88/x
  3. Step 3: Cross multiply
    643,018.72x = 887,376.48 × 356,550.88
  4. Step 4: Simplify right side
    643,018.72x = 316,394,864,835.30
  5. Step 5: Solve for x
    x = 316,394,864,835.30/643,018.72
  6. Step 6: Final answer
    x = 492,046.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.