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Finding the Fourth Proportional to 1,868,959.80, 2,803,439.70 and 1,851,245.10

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Solution

The fourth proportional to 1,868,959.80, 2,803,439.70 and 1,851,245.10 is: 2,776,867.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868,959.80 : 2,803,439.70 = 1,851,245.10 : x
  2. Step 2: Convert to fraction form
    1,868,959.80/2,803,439.70 = 1,851,245.10/x
  3. Step 3: Cross multiply
    1,868,959.80x = 2,803,439.70 × 1,851,245.10
  4. Step 4: Simplify right side
    1,868,959.80x = 5,189,854,007,770.47
  5. Step 5: Solve for x
    x = 5,189,854,007,770.47/1,868,959.80
  6. Step 6: Final answer
    x = 2,776,867.65

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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.