Home / 280,489.20-387,089.60-171,559.39

Finding the Fourth Proportional to 280,489.20, 387,089.60 and 171,559.39

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Solution

The fourth proportional to 280,489.20, 387,089.60 and 171,559.39 is: 236,760.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,489.20 : 387,089.60 = 171,559.39 : x
  2. Step 2: Convert to fraction form
    280,489.20/387,089.60 = 171,559.39/x
  3. Step 3: Cross multiply
    280,489.20x = 387,089.60 × 171,559.39
  4. Step 4: Simplify right side
    280,489.20x = 66,408,854,517.66
  5. Step 5: Solve for x
    x = 66,408,854,517.66/280,489.20
  6. Step 6: Final answer
    x = 236,760.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.