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Finding the Fourth Proportional to 620,745.90, 931,770.39 and 550,120.38

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Solution

The fourth proportional to 620,745.90, 931,770.39 and 550,120.38 is: 825,757.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,745.90 : 931,770.39 = 550,120.38 : x
  2. Step 2: Convert to fraction form
    620,745.90/931,770.39 = 550,120.38/x
  3. Step 3: Cross multiply
    620,745.90x = 931,770.39 × 550,120.38
  4. Step 4: Simplify right side
    620,745.90x = 512,585,881,019.55
  5. Step 5: Solve for x
    x = 512,585,881,019.55/620,745.90
  6. Step 6: Final answer
    x = 825,757.98

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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.