Home / 686,669,709.96-947,629,118.52-393,370,965

Finding the Fourth Proportional to 686,669,709.96, 947,629,118.52 and 393,370,965

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Solution

The fourth proportional to 686,669,709.96, 947,629,118.52 and 393,370,965 is: 542,866,206.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,669,709.96 : 947,629,118.52 = 393,370,965 : x
  2. Step 2: Convert to fraction form
    686,669,709.96/947,629,118.52 = 393,370,965/x
  3. Step 3: Cross multiply
    686,669,709.96x = 947,629,118.52 × 393,370,965
  4. Step 4: Simplify right side
    686,669,709.96x = 372,769,780,814,311,744
  5. Step 5: Solve for x
    x = 372,769,780,814,311,744/686,669,709.96
  6. Step 6: Final answer
    x = 542,866,206.86

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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.