Home / 378,927,975.69-522,921,416.87-213,915,545.19

Finding the Fourth Proportional to 378,927,975.69, 522,921,416.87 and 213,915,545.19

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Solution

The fourth proportional to 378,927,975.69, 522,921,416.87 and 213,915,545.19 is: 295,203,909.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,927,975.69 : 522,921,416.87 = 213,915,545.19 : x
  2. Step 2: Convert to fraction form
    378,927,975.69/522,921,416.87 = 213,915,545.19/x
  3. Step 3: Cross multiply
    378,927,975.69x = 522,921,416.87 × 213,915,545.19
  4. Step 4: Simplify right side
    378,927,975.69x = 111,861,019,980,203,744
  5. Step 5: Solve for x
    x = 111,861,019,980,203,744/378,927,975.69
  6. Step 6: Final answer
    x = 295,203,909.86

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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.