Home / 260,857.20-391,415.40-103,090.80

Finding the Fourth Proportional to 260,857.20, 391,415.40 and 103,090.80

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Solution

The fourth proportional to 260,857.20, 391,415.40 and 103,090.80 is: 154,687.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,857.20 : 391,415.40 = 103,090.80 : x
  2. Step 2: Convert to fraction form
    260,857.20/391,415.40 = 103,090.80/x
  3. Step 3: Cross multiply
    260,857.20x = 391,415.40 × 103,090.80
  4. Step 4: Simplify right side
    260,857.20x = 40,351,326,718.32
  5. Step 5: Solve for x
    x = 40,351,326,718.32/260,857.20
  6. Step 6: Final answer
    x = 154,687.42

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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.