Home / 378,141.16-521,838.32-208,381.36

Finding the Fourth Proportional to 378,141.16, 521,838.32 and 208,381.36

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Solution

The fourth proportional to 378,141.16, 521,838.32 and 208,381.36 is: 287,568.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,141.16 : 521,838.32 = 208,381.36 : x
  2. Step 2: Convert to fraction form
    378,141.16/521,838.32 = 208,381.36/x
  3. Step 3: Cross multiply
    378,141.16x = 521,838.32 × 208,381.36
  4. Step 4: Simplify right side
    378,141.16x = 108,741,378,821.72
  5. Step 5: Solve for x
    x = 108,741,378,821.72/378,141.16
  6. Step 6: Final answer
    x = 287,568.22

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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.