Home / 663,418.20-915,517.36-376,938.66

Finding the Fourth Proportional to 663,418.20, 915,517.36 and 376,938.66

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Solution

The fourth proportional to 663,418.20, 915,517.36 and 376,938.66 is: 520,175.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,418.20 : 915,517.36 = 376,938.66 : x
  2. Step 2: Convert to fraction form
    663,418.20/915,517.36 = 376,938.66/x
  3. Step 3: Cross multiply
    663,418.20x = 915,517.36 × 376,938.66
  4. Step 4: Simplify right side
    663,418.20x = 345,093,886,885.14
  5. Step 5: Solve for x
    x = 345,093,886,885.14/663,418.20
  6. Step 6: Final answer
    x = 520,175.49

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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.