Home / 378,128.19-521,827.84-208,373.25

Finding the Fourth Proportional to 378,128.19, 521,827.84 and 208,373.25

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Solution

The fourth proportional to 378,128.19, 521,827.84 and 208,373.25 is: 287,561.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,128.19 : 521,827.84 = 208,373.25 : x
  2. Step 2: Convert to fraction form
    378,128.19/521,827.84 = 208,373.25/x
  3. Step 3: Cross multiply
    378,128.19x = 521,827.84 × 208,373.25
  4. Step 4: Simplify right side
    378,128.19x = 108,734,961,919.41
  5. Step 5: Solve for x
    x = 108,734,961,919.41/378,128.19
  6. Step 6: Final answer
    x = 287,561.11

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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.