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Finding the Fourth Proportional to 571,845.60, 789,131.70 and 330,120

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Solution

The fourth proportional to 571,845.60, 789,131.70 and 330,120 is: 455,556.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,845.60 : 789,131.70 = 330,120 : x
  2. Step 2: Convert to fraction form
    571,845.60/789,131.70 = 330,120/x
  3. Step 3: Cross multiply
    571,845.60x = 789,131.70 × 330,120
  4. Step 4: Simplify right side
    571,845.60x = 260,508,156,804.00
  5. Step 5: Solve for x
    x = 260,508,156,804.00/571,845.60
  6. Step 6: Final answer
    x = 455,556.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.