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Finding the Fourth Proportional to 450,314.40, 622,621.20 and 394,327.20

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Solution

The fourth proportional to 450,314.40, 622,621.20 and 394,327.20 is: 545,211.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,314.40 : 622,621.20 = 394,327.20 : x
  2. Step 2: Convert to fraction form
    450,314.40/622,621.20 = 394,327.20/x
  3. Step 3: Cross multiply
    450,314.40x = 622,621.20 × 394,327.20
  4. Step 4: Simplify right side
    450,314.40x = 245,516,474,456.64
  5. Step 5: Solve for x
    x = 245,516,474,456.64/450,314.40
  6. Step 6: Final answer
    x = 545,211.24

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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.