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Finding the Fourth Proportional to 621,057.60, 930,921.96 and 321,236.31

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Solution

The fourth proportional to 621,057.60, 930,921.96 and 321,236.31 is: 481,510.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,057.60 : 930,921.96 = 321,236.31 : x
  2. Step 2: Convert to fraction form
    621,057.60/930,921.96 = 321,236.31/x
  3. Step 3: Cross multiply
    621,057.60x = 930,921.96 × 321,236.31
  4. Step 4: Simplify right side
    621,057.60x = 299,045,935,328.37
  5. Step 5: Solve for x
    x = 299,045,935,328.37/621,057.60
  6. Step 6: Final answer
    x = 481,510.79

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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.