Home / 378,142.16-521,839.68-208,382.36

Finding the Fourth Proportional to 378,142.16, 521,839.68 and 208,382.36

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Solution

The fourth proportional to 378,142.16, 521,839.68 and 208,382.36 is: 287,569.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,142.16 : 521,839.68 = 208,382.36 : x
  2. Step 2: Convert to fraction form
    378,142.16/521,839.68 = 208,382.36/x
  3. Step 3: Cross multiply
    378,142.16x = 521,839.68 × 208,382.36
  4. Step 4: Simplify right side
    378,142.16x = 108,742,184,060.05
  5. Step 5: Solve for x
    x = 108,742,184,060.05/378,142.16
  6. Step 6: Final answer
    x = 287,569.59

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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.