Home / 1,219,141.80-1,828,833.12-420,318.36

Finding the Fourth Proportional to 1,219,141.80, 1,828,833.12 and 420,318.36

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Solution

The fourth proportional to 1,219,141.80, 1,828,833.12 and 420,318.36 is: 630,519.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,219,141.80 : 1,828,833.12 = 420,318.36 : x
  2. Step 2: Convert to fraction form
    1,219,141.80/1,828,833.12 = 420,318.36/x
  3. Step 3: Cross multiply
    1,219,141.80x = 1,828,833.12 × 420,318.36
  4. Step 4: Simplify right side
    1,219,141.80x = 768,692,137,712.08
  5. Step 5: Solve for x
    x = 768,692,137,712.08/1,219,141.80
  6. Step 6: Final answer
    x = 630,519.06

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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.