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Finding the Fourth Proportional to 620,140.18, 855,887.03 and 378,563.38

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Solution

The fourth proportional to 620,140.18, 855,887.03 and 378,563.38 is: 522,474.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,140.18 : 855,887.03 = 378,563.38 : x
  2. Step 2: Convert to fraction form
    620,140.18/855,887.03 = 378,563.38/x
  3. Step 3: Cross multiply
    620,140.18x = 855,887.03 × 378,563.38
  4. Step 4: Simplify right side
    620,140.18x = 324,007,486,974.96
  5. Step 5: Solve for x
    x = 324,007,486,974.96/620,140.18
  6. Step 6: Final answer
    x = 522,474.59

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1.5x scale

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.