Home / 378,045.20-521,725.92-208,279.28

Finding the Fourth Proportional to 378,045.20, 521,725.92 and 208,279.28

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Solution

The fourth proportional to 378,045.20, 521,725.92 and 208,279.28 is: 287,438.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,045.20 : 521,725.92 = 208,279.28 : x
  2. Step 2: Convert to fraction form
    378,045.20/521,725.92 = 208,279.28/x
  3. Step 3: Cross multiply
    378,045.20x = 521,725.92 × 208,279.28
  4. Step 4: Simplify right side
    378,045.20x = 108,664,698,974.94
  5. Step 5: Solve for x
    x = 108,664,698,974.94/378,045.20
  6. Step 6: Final answer
    x = 287,438.38

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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.