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Finding the Fourth Proportional to 1,302,728.90, 1,954,019.23 and 391,892.00

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Solution

The fourth proportional to 1,302,728.90, 1,954,019.23 and 391,892.00 is: 587,815.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,302,728.90 : 1,954,019.23 = 391,892.00 : x
  2. Step 2: Convert to fraction form
    1,302,728.90/1,954,019.23 = 391,892.00/x
  3. Step 3: Cross multiply
    1,302,728.90x = 1,954,019.23 × 391,892.00
  4. Step 4: Simplify right side
    1,302,728.90x = 765,764,493,333.33
  5. Step 5: Solve for x
    x = 765,764,493,333.33/1,302,728.90
  6. Step 6: Final answer
    x = 587,815.70

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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.