Home / 1,219,142.80-1,828,834.62-420,319.36

Finding the Fourth Proportional to 1,219,142.80, 1,828,834.62 and 420,319.36

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Solution

The fourth proportional to 1,219,142.80, 1,828,834.62 and 420,319.36 is: 630,520.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219,142.80 : 1,828,834.62 = 420,319.36 : x
  2. Step 2: Convert to fraction form
    1,219,142.80/1,828,834.62 = 420,319.36/x
  3. Step 3: Cross multiply
    1,219,142.80x = 1,828,834.62 × 420,319.36
  4. Step 4: Simplify right side
    1,219,142.80x = 768,694,597,024.24
  5. Step 5: Solve for x
    x = 768,694,597,024.24/1,219,142.80
  6. Step 6: Final answer
    x = 630,520.56

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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.