Home / 686,669,711.96-947,629,121.28-393,370,967

Finding the Fourth Proportional to 686,669,711.96, 947,629,121.28 and 393,370,967

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Solution

The fourth proportional to 686,669,711.96, 947,629,121.28 and 393,370,967 is: 542,866,209.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,669,711.96 : 947,629,121.28 = 393,370,967 : x
  2. Step 2: Convert to fraction form
    686,669,711.96/947,629,121.28 = 393,370,967/x
  3. Step 3: Cross multiply
    686,669,711.96x = 947,629,121.28 × 393,370,967
  4. Step 4: Simplify right side
    686,669,711.96x = 372,769,783,795,273,856
  5. Step 5: Solve for x
    x = 372,769,783,795,273,856/686,669,711.96
  6. Step 6: Final answer
    x = 542,866,209.62

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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.