Home / 378,142.08-521,847.36-208,387.20

Finding the Fourth Proportional to 378,142.08, 521,847.36 and 208,387.20

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Solution

The fourth proportional to 378,142.08, 521,847.36 and 208,387.20 is: 287,580.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,142.08 : 521,847.36 = 208,387.20 : x
  2. Step 2: Convert to fraction form
    378,142.08/521,847.36 = 208,387.20/x
  3. Step 3: Cross multiply
    378,142.08x = 521,847.36 × 208,387.20
  4. Step 4: Simplify right side
    378,142.08x = 108,746,310,177.79
  5. Step 5: Solve for x
    x = 108,746,310,177.79/378,142.08
  6. Step 6: Final answer
    x = 287,580.56

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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.