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Finding the Fourth Proportional to 643,269.74, 887,818.52 and 356,882.09

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Solution

The fourth proportional to 643,269.74, 887,818.52 and 356,882.09 is: 492,556.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,269.74 : 887,818.52 = 356,882.09 : x
  2. Step 2: Convert to fraction form
    643,269.74/887,818.52 = 356,882.09/x
  3. Step 3: Cross multiply
    643,269.74x = 887,818.52 × 356,882.09
  4. Step 4: Simplify right side
    643,269.74x = 316,846,525,411.42
  5. Step 5: Solve for x
    x = 316,846,525,411.42/643,269.74
  6. Step 6: Final answer
    x = 492,556.25

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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.