Home / 809,297.40-1,212,488.10-387,643.80

Finding the Fourth Proportional to 809,297.40, 1,212,488.10 and 387,643.80

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Solution

The fourth proportional to 809,297.40, 1,212,488.10 and 387,643.80 is: 580,767.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,297.40 : 1,212,488.10 = 387,643.80 : x
  2. Step 2: Convert to fraction form
    809,297.40/1,212,488.10 = 387,643.80/x
  3. Step 3: Cross multiply
    809,297.40x = 1,212,488.10 × 387,643.80
  4. Step 4: Simplify right side
    809,297.40x = 470,013,494,538.78
  5. Step 5: Solve for x
    x = 470,013,494,538.78/809,297.40
  6. Step 6: Final answer
    x = 580,767.34

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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.