Home / 579,421.20-869,131.80-486,109.20

Finding the Fourth Proportional to 579,421.20, 869,131.80 and 486,109.20

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Solution

The fourth proportional to 579,421.20, 869,131.80 and 486,109.20 is: 729,163.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,421.20 : 869,131.80 = 486,109.20 : x
  2. Step 2: Convert to fraction form
    579,421.20/869,131.80 = 486,109.20/x
  3. Step 3: Cross multiply
    579,421.20x = 869,131.80 × 486,109.20
  4. Step 4: Simplify right side
    579,421.20x = 422,492,963,992.56
  5. Step 5: Solve for x
    x = 422,492,963,992.56/579,421.20
  6. Step 6: Final answer
    x = 729,163.80

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Double scale
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Similar ratio
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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.