Home / 613,968,178.65-921,429,842.25-428,530,976.98

Finding the Fourth Proportional to 613,968,178.65, 921,429,842.25 and 428,530,976.98

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Solution

The fourth proportional to 613,968,178.65, 921,429,842.25 and 428,530,976.98 is: 643,129,797.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,968,178.65 : 921,429,842.25 = 428,530,976.98 : x
  2. Step 2: Convert to fraction form
    613,968,178.65/921,429,842.25 = 428,530,976.98/x
  3. Step 3: Cross multiply
    613,968,178.65x = 921,429,842.25 × 428,530,976.98
  4. Step 4: Simplify right side
    613,968,178.65x = 394,861,230,517,919,808
  5. Step 5: Solve for x
    x = 394,861,230,517,919,808/613,968,178.65
  6. Step 6: Final answer
    x = 643,129,797.68

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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.