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Finding the Fourth Proportional to 622,779.84, 859,499.66 and 381,222.05

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Solution

The fourth proportional to 622,779.84, 859,499.66 and 381,222.05 is: 526,125.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,779.84 : 859,499.66 = 381,222.05 : x
  2. Step 2: Convert to fraction form
    622,779.84/859,499.66 = 381,222.05/x
  3. Step 3: Cross multiply
    622,779.84x = 859,499.66 × 381,222.05
  4. Step 4: Simplify right side
    622,779.84x = 327,660,219,015.06
  5. Step 5: Solve for x
    x = 327,660,219,015.06/622,779.84
  6. Step 6: Final answer
    x = 526,125.28

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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.