Home / 519,728,768.40-780,034,051.80-213,240,838.80

Finding the Fourth Proportional to 519,728,768.40, 780,034,051.80 and 213,240,838.80

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Solution

The fourth proportional to 519,728,768.40, 780,034,051.80 and 213,240,838.80 is: 320,042,155.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,728,768.40 : 780,034,051.80 = 213,240,838.80 : x
  2. Step 2: Convert to fraction form
    519,728,768.40/780,034,051.80 = 213,240,838.80/x
  3. Step 3: Cross multiply
    519,728,768.40x = 780,034,051.80 × 213,240,838.80
  4. Step 4: Simplify right side
    519,728,768.40x = 166,335,115,498,394,656
  5. Step 5: Solve for x
    x = 166,335,115,498,394,656/519,728,768.40
  6. Step 6: Final answer
    x = 320,042,155.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.