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Finding the Fourth Proportional to 260,701.31, 391,199.91 and 140,756.67

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Solution

The fourth proportional to 260,701.31, 391,199.91 and 140,756.67 is: 211,214.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,701.31 : 391,199.91 = 140,756.67 : x
  2. Step 2: Convert to fraction form
    260,701.31/391,199.91 = 140,756.67/x
  3. Step 3: Cross multiply
    260,701.31x = 391,199.91 × 140,756.67
  4. Step 4: Simplify right side
    260,701.31x = 55,063,996,635.90
  5. Step 5: Solve for x
    x = 55,063,996,635.90/260,701.31
  6. Step 6: Final answer
    x = 211,214.88

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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.