Home / 378,171.45-521,874.90-208,405.17

Finding the Fourth Proportional to 378,171.45, 521,874.90 and 208,405.17

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Solution

The fourth proportional to 378,171.45, 521,874.90 and 208,405.17 is: 287,598.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,171.45 : 521,874.90 = 208,405.17 : x
  2. Step 2: Convert to fraction form
    378,171.45/521,874.90 = 208,405.17/x
  3. Step 3: Cross multiply
    378,171.45x = 521,874.90 × 208,405.17
  4. Step 4: Simplify right side
    378,171.45x = 108,761,427,253.23
  5. Step 5: Solve for x
    x = 108,761,427,253.23/378,171.45
  6. Step 6: Final answer
    x = 287,598.20

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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.