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Finding the Fourth Proportional to 890,770.80, 1,336,026.60 and 259,618.80

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Solution

The fourth proportional to 890,770.80, 1,336,026.60 and 259,618.80 is: 389,390.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,770.80 : 1,336,026.60 = 259,618.80 : x
  2. Step 2: Convert to fraction form
    890,770.80/1,336,026.60 = 259,618.80/x
  3. Step 3: Cross multiply
    890,770.80x = 1,336,026.60 × 259,618.80
  4. Step 4: Simplify right side
    890,770.80x = 346,857,622,660.08
  5. Step 5: Solve for x
    x = 346,857,622,660.08/890,770.80
  6. Step 6: Final answer
    x = 389,390.43

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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.