Home / 919,756.90-1,268,178.87-629,508.46

Finding the Fourth Proportional to 919,756.90, 1,268,178.87 and 629,508.46

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Solution

The fourth proportional to 919,756.90, 1,268,178.87 and 629,508.46 is: 867,978.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,756.90 : 1,268,178.87 = 629,508.46 : x
  2. Step 2: Convert to fraction form
    919,756.90/1,268,178.87 = 629,508.46/x
  3. Step 3: Cross multiply
    919,756.90x = 1,268,178.87 × 629,508.46
  4. Step 4: Simplify right side
    919,756.90x = 798,329,327,458.24
  5. Step 5: Solve for x
    x = 798,329,327,458.24/919,756.90
  6. Step 6: Final answer
    x = 867,978.62

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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.