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Finding the Fourth Proportional to 1,207,721.70, 1,693,298.70 and 1,207,721.70

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Solution

The fourth proportional to 1,207,721.70, 1,693,298.70 and 1,207,721.70 is: 1,693,298.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,721.70 : 1,693,298.70 = 1,207,721.70 : x
  2. Step 2: Convert to fraction form
    1,207,721.70/1,693,298.70 = 1,207,721.70/x
  3. Step 3: Cross multiply
    1,207,721.70x = 1,693,298.70 × 1,207,721.70
  4. Step 4: Simplify right side
    1,207,721.70x = 2,045,033,584,571.79
  5. Step 5: Solve for x
    x = 2,045,033,584,571.79/1,207,721.70
  6. Step 6: Final answer
    x = 1,693,298.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.