Home / 431,315.32-647,089.46-131,787.72

Finding the Fourth Proportional to 431,315.32, 647,089.46 and 131,787.72

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Solution

The fourth proportional to 431,315.32, 647,089.46 and 131,787.72 is: 197,717.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,315.32 : 647,089.46 = 131,787.72 : x
  2. Step 2: Convert to fraction form
    431,315.32/647,089.46 = 131,787.72/x
  3. Step 3: Cross multiply
    431,315.32x = 647,089.46 × 131,787.72
  4. Step 4: Simplify right side
    431,315.32x = 85,278,444,569.43
  5. Step 5: Solve for x
    x = 85,278,444,569.43/431,315.32
  6. Step 6: Final answer
    x = 197,717.17

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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.