Home / 686,669,718.96-947,629,130.94-393,370,974

Finding the Fourth Proportional to 686,669,718.96, 947,629,130.94 and 393,370,974

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Solution

The fourth proportional to 686,669,718.96, 947,629,130.94 and 393,370,974 is: 542,866,219.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,669,718.96 : 947,629,130.94 = 393,370,974 : x
  2. Step 2: Convert to fraction form
    686,669,718.96/947,629,130.94 = 393,370,974/x
  3. Step 3: Cross multiply
    686,669,718.96x = 947,629,130.94 × 393,370,974
  4. Step 4: Simplify right side
    686,669,718.96x = 372,769,794,228,641,344
  5. Step 5: Solve for x
    x = 372,769,794,228,641,344/686,669,718.96
  6. Step 6: Final answer
    x = 542,866,219.28

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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.