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Finding the Fourth Proportional to 260,139.40, 389,771.70 and 215,524.60

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Solution

The fourth proportional to 260,139.40, 389,771.70 and 215,524.60 is: 322,924.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,139.40 : 389,771.70 = 215,524.60 : x
  2. Step 2: Convert to fraction form
    260,139.40/389,771.70 = 215,524.60/x
  3. Step 3: Cross multiply
    260,139.40x = 389,771.70 × 215,524.60
  4. Step 4: Simplify right side
    260,139.40x = 84,005,389,733.82
  5. Step 5: Solve for x
    x = 84,005,389,733.82/260,139.40
  6. Step 6: Final answer
    x = 322,924.52

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1.5x scale

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.