Home / 378,170,226.80-521,915,035.12-221,668,823.92

Finding the Fourth Proportional to 378,170,226.80, 521,915,035.12 and 221,668,823.92

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Solution

The fourth proportional to 378,170,226.80, 521,915,035.12 and 221,668,823.92 is: 305,926,495.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,170,226.80 : 521,915,035.12 = 221,668,823.92 : x
  2. Step 2: Convert to fraction form
    378,170,226.80/521,915,035.12 = 221,668,823.92/x
  3. Step 3: Cross multiply
    378,170,226.80x = 521,915,035.12 × 221,668,823.92
  4. Step 4: Simplify right side
    378,170,226.80x = 115,692,292,021,215,888
  5. Step 5: Solve for x
    x = 115,692,292,021,215,888/378,170,226.80
  6. Step 6: Final answer
    x = 305,926,495.06

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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.