Home / 378,057.20-521,742.48-208,291.28

Finding the Fourth Proportional to 378,057.20, 521,742.48 and 208,291.28

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Solution

The fourth proportional to 378,057.20, 521,742.48 and 208,291.28 is: 287,454.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,057.20 : 521,742.48 = 208,291.28 : x
  2. Step 2: Convert to fraction form
    378,057.20/521,742.48 = 208,291.28/x
  3. Step 3: Cross multiply
    378,057.20x = 521,742.48 × 208,291.28
  4. Step 4: Simplify right side
    378,057.20x = 108,674,408,989.57
  5. Step 5: Solve for x
    x = 108,674,408,989.57/378,057.20
  6. Step 6: Final answer
    x = 287,454.94

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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.