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Finding the Fourth Proportional to 620,795.20, 930,720.76 and 321,084.94

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Solution

The fourth proportional to 620,795.20, 930,720.76 and 321,084.94 is: 481,383.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,795.20 : 930,720.76 = 321,084.94 : x
  2. Step 2: Convert to fraction form
    620,795.20/930,720.76 = 321,084.94/x
  3. Step 3: Cross multiply
    620,795.20x = 930,720.76 × 321,084.94
  4. Step 4: Simplify right side
    620,795.20x = 298,840,419,381.35
  5. Step 5: Solve for x
    x = 298,840,419,381.35/620,795.20
  6. Step 6: Final answer
    x = 481,383.26

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1.5x scale

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.