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Finding the Fourth Proportional to 453,118.87, 679,634.34 and 137,578.51

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Solution

The fourth proportional to 453,118.87, 679,634.34 and 137,578.51 is: 206,354.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,118.87 : 679,634.34 = 137,578.51 : x
  2. Step 2: Convert to fraction form
    453,118.87/679,634.34 = 137,578.51/x
  3. Step 3: Cross multiply
    453,118.87x = 679,634.34 × 137,578.51
  4. Step 4: Simplify right side
    453,118.87x = 93,503,079,842.03
  5. Step 5: Solve for x
    x = 93,503,079,842.03/453,118.87
  6. Step 6: Final answer
    x = 206,354.42

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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.