Home / 378,834.34-522,803.60-215,486.62

Finding the Fourth Proportional to 378,834.34, 522,803.60 and 215,486.62

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Solution

The fourth proportional to 378,834.34, 522,803.60 and 215,486.62 is: 297,378.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,834.34 : 522,803.60 = 215,486.62 : x
  2. Step 2: Convert to fraction form
    378,834.34/522,803.60 = 215,486.62/x
  3. Step 3: Cross multiply
    378,834.34x = 522,803.60 × 215,486.62
  4. Step 4: Simplify right side
    378,834.34x = 112,657,180,687.83
  5. Step 5: Solve for x
    x = 112,657,180,687.83/378,834.34
  6. Step 6: Final answer
    x = 297,378.48

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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.