Home / 378,057.61-521,719.55-208,290.25

Finding the Fourth Proportional to 378,057.61, 521,719.55 and 208,290.25

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Solution

The fourth proportional to 378,057.61, 521,719.55 and 208,290.25 is: 287,440.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,057.61 : 521,719.55 = 208,290.25 : x
  2. Step 2: Convert to fraction form
    378,057.61/521,719.55 = 208,290.25/x
  3. Step 3: Cross multiply
    378,057.61x = 521,719.55 × 208,290.25
  4. Step 4: Simplify right side
    378,057.61x = 108,669,095,499.39
  5. Step 5: Solve for x
    x = 108,669,095,499.39/378,057.61
  6. Step 6: Final answer
    x = 287,440.57

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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.