Home / 686,063.86-1,029,195.42-212,787.34

Finding the Fourth Proportional to 686,063.86, 1,029,195.42 and 212,787.34

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Solution

The fourth proportional to 686,063.86, 1,029,195.42 and 212,787.34 is: 319,211.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,063.86 : 1,029,195.42 = 212,787.34 : x
  2. Step 2: Convert to fraction form
    686,063.86/1,029,195.42 = 212,787.34/x
  3. Step 3: Cross multiply
    686,063.86x = 1,029,195.42 × 212,787.34
  4. Step 4: Simplify right side
    686,063.86x = 218,999,755,761.98
  5. Step 5: Solve for x
    x = 218,999,755,761.98/686,063.86
  6. Step 6: Final answer
    x = 319,211.91

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1.5x scale

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.