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Finding the Fourth Proportional to 260,140.40, 389,773.20 and 215,525.60

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Solution

The fourth proportional to 260,140.40, 389,773.20 and 215,525.60 is: 322,926.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,140.40 : 389,773.20 = 215,525.60 : x
  2. Step 2: Convert to fraction form
    260,140.40/389,773.20 = 215,525.60/x
  3. Step 3: Cross multiply
    260,140.40x = 389,773.20 × 215,525.60
  4. Step 4: Simplify right side
    260,140.40x = 84,006,102,793.92
  5. Step 5: Solve for x
    x = 84,006,102,793.92/260,140.40
  6. Step 6: Final answer
    x = 322,926.02

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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.