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Finding the Fourth Proportional to 414,438.40, 621,964.80 and 274,150.40

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Solution

The fourth proportional to 414,438.40, 621,964.80 and 274,150.40 is: 411,428.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,438.40 : 621,964.80 = 274,150.40 : x
  2. Step 2: Convert to fraction form
    414,438.40/621,964.80 = 274,150.40/x
  3. Step 3: Cross multiply
    414,438.40x = 621,964.80 × 274,150.40
  4. Step 4: Simplify right side
    414,438.40x = 170,511,898,705.92
  5. Step 5: Solve for x
    x = 170,511,898,705.92/414,438.40
  6. Step 6: Final answer
    x = 411,428.81

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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.