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Finding the Fourth Proportional to 1,986,070.49, 2,978,662.40 and 920,974.16

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Solution

The fourth proportional to 1,986,070.49, 2,978,662.40 and 920,974.16 is: 1,381,255.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,070.49 : 2,978,662.40 = 920,974.16 : x
  2. Step 2: Convert to fraction form
    1,986,070.49/2,978,662.40 = 920,974.16/x
  3. Step 3: Cross multiply
    1,986,070.49x = 2,978,662.40 × 920,974.16
  4. Step 4: Simplify right side
    1,986,070.49x = 2,743,271,082,265.40
  5. Step 5: Solve for x
    x = 2,743,271,082,265.40/1,986,070.49
  6. Step 6: Final answer
    x = 1,381,255.65

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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.