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Finding the Fourth Proportional to 502,578.88, 693,539.82 and 287,738.92

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Solution

The fourth proportional to 502,578.88, 693,539.82 and 287,738.92 is: 397,068.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,578.88 : 693,539.82 = 287,738.92 : x
  2. Step 2: Convert to fraction form
    502,578.88/693,539.82 = 287,738.92/x
  3. Step 3: Cross multiply
    502,578.88x = 693,539.82 × 287,738.92
  4. Step 4: Simplify right side
    502,578.88x = 199,558,398,783.79
  5. Step 5: Solve for x
    x = 199,558,398,783.79/502,578.88
  6. Step 6: Final answer
    x = 397,068.81

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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.