Home / 378,512.74-522,257.78-215,156.40

Finding the Fourth Proportional to 378,512.74, 522,257.78 and 215,156.40

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Solution

The fourth proportional to 378,512.74, 522,257.78 and 215,156.40 is: 296,864.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,512.74 : 522,257.78 = 215,156.40 : x
  2. Step 2: Convert to fraction form
    378,512.74/522,257.78 = 215,156.40/x
  3. Step 3: Cross multiply
    378,512.74x = 522,257.78 × 215,156.40
  4. Step 4: Simplify right side
    378,512.74x = 112,367,103,816.79
  5. Step 5: Solve for x
    x = 112,367,103,816.79/378,512.74
  6. Step 6: Final answer
    x = 296,864.79

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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.