Home / 1,278,531.86-1,917,299.31-479,376.98

Finding the Fourth Proportional to 1,278,531.86, 1,917,299.31 and 479,376.98

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Solution

The fourth proportional to 1,278,531.86, 1,917,299.31 and 479,376.98 is: 718,878.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,531.86 : 1,917,299.31 = 479,376.98 : x
  2. Step 2: Convert to fraction form
    1,278,531.86/1,917,299.31 = 479,376.98/x
  3. Step 3: Cross multiply
    1,278,531.86x = 1,917,299.31 × 479,376.98
  4. Step 4: Simplify right side
    1,278,531.86x = 919,109,152,983.88
  5. Step 5: Solve for x
    x = 919,109,152,983.88/1,278,531.86
  6. Step 6: Final answer
    x = 718,878.57

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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.