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Finding the Fourth Proportional to 998,912, 1,498,369.44 and 407,936

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Solution

The fourth proportional to 998,912, 1,498,369.44 and 407,936 is: 611,904.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    998,912 : 1,498,369.44 = 407,936 : x
  2. Step 2: Convert to fraction form
    998,912/1,498,369.44 = 407,936/x
  3. Step 3: Cross multiply
    998,912x = 1,498,369.44 × 407,936
  4. Step 4: Simplify right side
    998,912x = 611,238,835,875.84
  5. Step 5: Solve for x
    x = 611,238,835,875.84/998,912
  6. Step 6: Final answer
    x = 611,904.59

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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.