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Finding the Fourth Proportional to 622,361.76, 858,879.68 and 380,751.68

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Solution

The fourth proportional to 622,361.76, 858,879.68 and 380,751.68 is: 525,449.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,361.76 : 858,879.68 = 380,751.68 : x
  2. Step 2: Convert to fraction form
    622,361.76/858,879.68 = 380,751.68/x
  3. Step 3: Cross multiply
    622,361.76x = 858,879.68 × 380,751.68
  4. Step 4: Simplify right side
    622,361.76x = 327,019,881,077.86
  5. Step 5: Solve for x
    x = 327,019,881,077.86/622,361.76
  6. Step 6: Final answer
    x = 525,449.83

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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.