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Finding the Fourth Proportional to 620,572,021.80, 930,858,032.70 and 275,158,991.40

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Solution

The fourth proportional to 620,572,021.80, 930,858,032.70 and 275,158,991.40 is: 412,738,487.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,572,021.80 : 930,858,032.70 = 275,158,991.40 : x
  2. Step 2: Convert to fraction form
    620,572,021.80/930,858,032.70 = 275,158,991.40/x
  3. Step 3: Cross multiply
    620,572,021.80x = 930,858,032.70 × 275,158,991.40
  4. Step 4: Simplify right side
    620,572,021.80x = 256,133,957,414,320,224
  5. Step 5: Solve for x
    x = 256,133,957,414,320,224/620,572,021.80
  6. Step 6: Final answer
    x = 412,738,487.10

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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.