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Finding the Fourth Proportional to 458,104.80, 687,675.60 and 271,221.60

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Solution

The fourth proportional to 458,104.80, 687,675.60 and 271,221.60 is: 407,139.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,104.80 : 687,675.60 = 271,221.60 : x
  2. Step 2: Convert to fraction form
    458,104.80/687,675.60 = 271,221.60/x
  3. Step 3: Cross multiply
    458,104.80x = 687,675.60 × 271,221.60
  4. Step 4: Simplify right side
    458,104.80x = 186,512,476,512.96
  5. Step 5: Solve for x
    x = 186,512,476,512.96/458,104.80
  6. Step 6: Final answer
    x = 407,139.32

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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.