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Finding the Fourth Proportional to 1,208,583.80, 1,810,907.40 and 889,719.20

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Solution

The fourth proportional to 1,208,583.80, 1,810,907.40 and 889,719.20 is: 1,333,129.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,583.80 : 1,810,907.40 = 889,719.20 : x
  2. Step 2: Convert to fraction form
    1,208,583.80/1,810,907.40 = 889,719.20/x
  3. Step 3: Cross multiply
    1,208,583.80x = 1,810,907.40 × 889,719.20
  4. Step 4: Simplify right side
    1,208,583.80x = 1,611,199,083,202.08
  5. Step 5: Solve for x
    x = 1,611,199,083,202.08/1,208,583.80
  6. Step 6: Final answer
    x = 1,333,129.80

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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.