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Finding the Fourth Proportional to 378,036.70, 521,340.22 and 275,900.38

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Solution

The fourth proportional to 378,036.70, 521,340.22 and 275,900.38 is: 380,486.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,036.70 : 521,340.22 = 275,900.38 : x
  2. Step 2: Convert to fraction form
    378,036.70/521,340.22 = 275,900.38/x
  3. Step 3: Cross multiply
    378,036.70x = 521,340.22 × 275,900.38
  4. Step 4: Simplify right side
    378,036.70x = 143,837,965,803.83
  5. Step 5: Solve for x
    x = 143,837,965,803.83/378,036.70
  6. Step 6: Final answer
    x = 380,486.78

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1.5x scale

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.