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Finding the Fourth Proportional to 469,579.71, 647,300.97 and 287,954.85

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Solution

The fourth proportional to 469,579.71, 647,300.97 and 287,954.85 is: 396,936.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,579.71 : 647,300.97 = 287,954.85 : x
  2. Step 2: Convert to fraction form
    469,579.71/647,300.97 = 287,954.85/x
  3. Step 3: Cross multiply
    469,579.71x = 647,300.97 × 287,954.85
  4. Step 4: Simplify right side
    469,579.71x = 186,393,453,721.20
  5. Step 5: Solve for x
    x = 186,393,453,721.20/469,579.71
  6. Step 6: Final answer
    x = 396,936.77

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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.