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Finding the Fourth Proportional to 260,724.60, 391,086.90 and 127,625.40

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Solution

The fourth proportional to 260,724.60, 391,086.90 and 127,625.40 is: 191,438.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,724.60 : 391,086.90 = 127,625.40 : x
  2. Step 2: Convert to fraction form
    260,724.60/391,086.90 = 127,625.40/x
  3. Step 3: Cross multiply
    260,724.60x = 391,086.90 × 127,625.40
  4. Step 4: Simplify right side
    260,724.60x = 49,912,622,047.26
  5. Step 5: Solve for x
    x = 49,912,622,047.26/260,724.60
  6. Step 6: Final answer
    x = 191,438.10

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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.