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Finding the Fourth Proportional to 1,226,485.80, 1,839,728.70 and 907,621.20

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Solution

The fourth proportional to 1,226,485.80, 1,839,728.70 and 907,621.20 is: 1,361,431.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226,485.80 : 1,839,728.70 = 907,621.20 : x
  2. Step 2: Convert to fraction form
    1,226,485.80/1,839,728.70 = 907,621.20/x
  3. Step 3: Cross multiply
    1,226,485.80x = 1,839,728.70 × 907,621.20
  4. Step 4: Simplify right side
    1,226,485.80x = 1,669,776,770,368.44
  5. Step 5: Solve for x
    x = 1,669,776,770,368.44/1,226,485.80
  6. Step 6: Final answer
    x = 1,361,431.80

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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.