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Finding the Fourth Proportional to 606,965.10, 911,431.80 and 439,659.60

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Solution

The fourth proportional to 606,965.10, 911,431.80 and 439,659.60 is: 660,202.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,965.10 : 911,431.80 = 439,659.60 : x
  2. Step 2: Convert to fraction form
    606,965.10/911,431.80 = 439,659.60/x
  3. Step 3: Cross multiply
    606,965.10x = 911,431.80 × 439,659.60
  4. Step 4: Simplify right side
    606,965.10x = 400,719,740,615.28
  5. Step 5: Solve for x
    x = 400,719,740,615.28/606,965.10
  6. Step 6: Final answer
    x = 660,202.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.