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Finding the Fourth Proportional to 659,220.80, 989,090.40 and 259,793.60

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Solution

The fourth proportional to 659,220.80, 989,090.40 and 259,793.60 is: 389,792.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,220.80 : 989,090.40 = 259,793.60 : x
  2. Step 2: Convert to fraction form
    659,220.80/989,090.40 = 259,793.60/x
  3. Step 3: Cross multiply
    659,220.80x = 989,090.40 × 259,793.60
  4. Step 4: Simplify right side
    659,220.80x = 256,959,355,741.44
  5. Step 5: Solve for x
    x = 256,959,355,741.44/659,220.80
  6. Step 6: Final answer
    x = 389,792.55

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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.