Home / 420,181.80-629,747.10-209,878.44

Finding the Fourth Proportional to 420,181.80, 629,747.10 and 209,878.44

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Solution

The fourth proportional to 420,181.80, 629,747.10 and 209,878.44 is: 314,555.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,181.80 : 629,747.10 = 209,878.44 : x
  2. Step 2: Convert to fraction form
    420,181.80/629,747.10 = 209,878.44/x
  3. Step 3: Cross multiply
    420,181.80x = 629,747.10 × 209,878.44
  4. Step 4: Simplify right side
    420,181.80x = 132,170,338,942.52
  5. Step 5: Solve for x
    x = 132,170,338,942.52/420,181.80
  6. Step 6: Final answer
    x = 314,555.13

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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.