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Finding the Fourth Proportional to 622,491.05, 859,025.98 and 380,755.87

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Solution

The fourth proportional to 622,491.05, 859,025.98 and 380,755.87 is: 525,435.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,491.05 : 859,025.98 = 380,755.87 : x
  2. Step 2: Convert to fraction form
    622,491.05/859,025.98 = 380,755.87/x
  3. Step 3: Cross multiply
    622,491.05x = 859,025.98 × 380,755.87
  4. Step 4: Simplify right side
    622,491.05x = 327,079,184,367.50
  5. Step 5: Solve for x
    x = 327,079,184,367.50/622,491.05
  6. Step 6: Final answer
    x = 525,435.96

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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.