Home / 686,669,722.46-947,629,135.77-393,370,977.50

Finding the Fourth Proportional to 686,669,722.46, 947,629,135.77 and 393,370,977.50

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Solution

The fourth proportional to 686,669,722.46, 947,629,135.77 and 393,370,977.50 is: 542,866,224.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,669,722.46 : 947,629,135.77 = 393,370,977.50 : x
  2. Step 2: Convert to fraction form
    686,669,722.46/947,629,135.77 = 393,370,977.50/x
  3. Step 3: Cross multiply
    686,669,722.46x = 947,629,135.77 × 393,370,977.50
  4. Step 4: Simplify right side
    686,669,722.46x = 372,769,799,445,325,120
  5. Step 5: Solve for x
    x = 372,769,799,445,325,120/686,669,722.46
  6. Step 6: Final answer
    x = 542,866,224.11

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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.