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Finding the Fourth Proportional to 1,256,689.80, 1,734,239.52 and 683,734.14

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Solution

The fourth proportional to 1,256,689.80, 1,734,239.52 and 683,734.14 is: 943,557.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256,689.80 : 1,734,239.52 = 683,734.14 : x
  2. Step 2: Convert to fraction form
    1,256,689.80/1,734,239.52 = 683,734.14/x
  3. Step 3: Cross multiply
    1,256,689.80x = 1,734,239.52 × 683,734.14
  4. Step 4: Simplify right side
    1,256,689.80x = 1,185,758,766,761.21
  5. Step 5: Solve for x
    x = 1,185,758,766,761.21/1,256,689.80
  6. Step 6: Final answer
    x = 943,557.25

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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.