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Finding the Fourth Proportional to 620,179.20, 855,940.50 and 378,602.10

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Solution

The fourth proportional to 620,179.20, 855,940.50 and 378,602.10 is: 522,527.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,179.20 : 855,940.50 = 378,602.10 : x
  2. Step 2: Convert to fraction form
    620,179.20/855,940.50 = 378,602.10/x
  3. Step 3: Cross multiply
    620,179.20x = 855,940.50 × 378,602.10
  4. Step 4: Simplify right side
    620,179.20x = 324,060,870,775.05
  5. Step 5: Solve for x
    x = 324,060,870,775.05/620,179.20
  6. Step 6: Final answer
    x = 522,527.80

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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.