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Finding the Fourth Proportional to 679,997, 1,019,989.42 and 253,518.33

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Solution

The fourth proportional to 679,997, 1,019,989.42 and 253,518.33 is: 380,275.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,997 : 1,019,989.42 = 253,518.33 : x
  2. Step 2: Convert to fraction form
    679,997/1,019,989.42 = 253,518.33/x
  3. Step 3: Cross multiply
    679,997x = 1,019,989.42 × 253,518.33
  4. Step 4: Simplify right side
    679,997x = 258,586,014,376.07
  5. Step 5: Solve for x
    x = 258,586,014,376.07/679,997
  6. Step 6: Final answer
    x = 380,275.23

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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.