Home / 260,421.21-390,669.24-80,520.67

Finding the Fourth Proportional to 260,421.21, 390,669.24 and 80,520.67

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Solution

The fourth proportional to 260,421.21, 390,669.24 and 80,520.67 is: 120,792.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,421.21 : 390,669.24 = 80,520.67 : x
  2. Step 2: Convert to fraction form
    260,421.21/390,669.24 = 80,520.67/x
  3. Step 3: Cross multiply
    260,421.21x = 390,669.24 × 80,520.67
  4. Step 4: Simplify right side
    260,421.21x = 31,456,948,550.59
  5. Step 5: Solve for x
    x = 31,456,948,550.59/260,421.21
  6. Step 6: Final answer
    x = 120,792.58

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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.