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Finding the Fourth Proportional to 1,939,644.64, 2,676,517.88 and 1,080,284.88

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Solution

The fourth proportional to 1,939,644.64, 2,676,517.88 and 1,080,284.88 is: 1,490,686.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939,644.64 : 2,676,517.88 = 1,080,284.88 : x
  2. Step 2: Convert to fraction form
    1,939,644.64/2,676,517.88 = 1,080,284.88/x
  3. Step 3: Cross multiply
    1,939,644.64x = 2,676,517.88 × 1,080,284.88
  4. Step 4: Simplify right side
    1,939,644.64x = 2,891,401,796,813.65
  5. Step 5: Solve for x
    x = 2,891,401,796,813.65/1,939,644.64
  6. Step 6: Final answer
    x = 1,490,686.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.