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Finding the Fourth Proportional to 1,212,892.98, 1,819,521.45 and 391,957.98

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Solution

The fourth proportional to 1,212,892.98, 1,819,521.45 and 391,957.98 is: 587,995.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,892.98 : 1,819,521.45 = 391,957.98 : x
  2. Step 2: Convert to fraction form
    1,212,892.98/1,819,521.45 = 391,957.98/x
  3. Step 3: Cross multiply
    1,212,892.98x = 1,819,521.45 × 391,957.98
  4. Step 4: Simplify right side
    1,212,892.98x = 713,175,952,108.67
  5. Step 5: Solve for x
    x = 713,175,952,108.67/1,212,892.98
  6. Step 6: Final answer
    x = 587,995.78

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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.