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Finding the Fourth Proportional to 1,229,297.80, 1,843,946.70 and 1,221,424.60

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Solution

The fourth proportional to 1,229,297.80, 1,843,946.70 and 1,221,424.60 is: 1,832,136.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229,297.80 : 1,843,946.70 = 1,221,424.60 : x
  2. Step 2: Convert to fraction form
    1,229,297.80/1,843,946.70 = 1,221,424.60/x
  3. Step 3: Cross multiply
    1,229,297.80x = 1,843,946.70 × 1,221,424.60
  4. Step 4: Simplify right side
    1,229,297.80x = 2,252,241,860,468.82
  5. Step 5: Solve for x
    x = 2,252,241,860,468.82/1,229,297.80
  6. Step 6: Final answer
    x = 1,832,136.90

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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.