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Finding the Fourth Proportional to 764,620.94, 1,055,181 and 420,479.06

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Solution

The fourth proportional to 764,620.94, 1,055,181 and 420,479.06 is: 580,263.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,620.94 : 1,055,181 = 420,479.06 : x
  2. Step 2: Convert to fraction form
    764,620.94/1,055,181 = 420,479.06/x
  3. Step 3: Cross multiply
    764,620.94x = 1,055,181 × 420,479.06
  4. Step 4: Simplify right side
    764,620.94x = 443,681,515,009.86
  5. Step 5: Solve for x
    x = 443,681,515,009.86/764,620.94
  6. Step 6: Final answer
    x = 580,263.36

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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.