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Finding the Fourth Proportional to 1,079,424.80, 1,619,137.20 and 1,048,320.80

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Solution

The fourth proportional to 1,079,424.80, 1,619,137.20 and 1,048,320.80 is: 1,572,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079,424.80 : 1,619,137.20 = 1,048,320.80 : x
  2. Step 2: Convert to fraction form
    1,079,424.80/1,619,137.20 = 1,048,320.80/x
  3. Step 3: Cross multiply
    1,079,424.80x = 1,619,137.20 × 1,048,320.80
  4. Step 4: Simplify right side
    1,079,424.80x = 1,697,375,204,813.76
  5. Step 5: Solve for x
    x = 1,697,375,204,813.76/1,079,424.80
  6. Step 6: Final answer
    x = 1,572,481.20

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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.