Home / 1,320,423.20-1,981,290.90-521,730.80

Finding the Fourth Proportional to 1,320,423.20, 1,981,290.90 and 521,730.80

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Solution

The fourth proportional to 1,320,423.20, 1,981,290.90 and 521,730.80 is: 782,855.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,423.20 : 1,981,290.90 = 521,730.80 : x
  2. Step 2: Convert to fraction form
    1,320,423.20/1,981,290.90 = 521,730.80/x
  3. Step 3: Cross multiply
    1,320,423.20x = 1,981,290.90 × 521,730.80
  4. Step 4: Simplify right side
    1,320,423.20x = 1,033,700,486,289.72
  5. Step 5: Solve for x
    x = 1,033,700,486,289.72/1,320,423.20
  6. Step 6: Final answer
    x = 782,855.44

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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.