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Finding the Fourth Proportional to 439,813.80, 661,130.10 and 408,612.60

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Solution

The fourth proportional to 439,813.80, 661,130.10 and 408,612.60 is: 614,228.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,813.80 : 661,130.10 = 408,612.60 : x
  2. Step 2: Convert to fraction form
    439,813.80/661,130.10 = 408,612.60/x
  3. Step 3: Cross multiply
    439,813.80x = 661,130.10 × 408,612.60
  4. Step 4: Simplify right side
    439,813.80x = 270,146,089,099.26
  5. Step 5: Solve for x
    x = 270,146,089,099.26/439,813.80
  6. Step 6: Final answer
    x = 614,228.31

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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.