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Finding the Fourth Proportional to 620,060.40, 930,090.60 and 419,293.80

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Solution

The fourth proportional to 620,060.40, 930,090.60 and 419,293.80 is: 628,940.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,060.40 : 930,090.60 = 419,293.80 : x
  2. Step 2: Convert to fraction form
    620,060.40/930,090.60 = 419,293.80/x
  3. Step 3: Cross multiply
    620,060.40x = 930,090.60 × 419,293.80
  4. Step 4: Simplify right side
    620,060.40x = 389,981,222,018.28
  5. Step 5: Solve for x
    x = 389,981,222,018.28/620,060.40
  6. Step 6: Final answer
    x = 628,940.70

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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.