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Finding the Fourth Proportional to 839,474.40, 1,259,096.40 and 278,450.40

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Solution

The fourth proportional to 839,474.40, 1,259,096.40 and 278,450.40 is: 417,637.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,474.40 : 1,259,096.40 = 278,450.40 : x
  2. Step 2: Convert to fraction form
    839,474.40/1,259,096.40 = 278,450.40/x
  3. Step 3: Cross multiply
    839,474.40x = 1,259,096.40 × 278,450.40
  4. Step 4: Simplify right side
    839,474.40x = 350,595,896,218.56
  5. Step 5: Solve for x
    x = 350,595,896,218.56/839,474.40
  6. Step 6: Final answer
    x = 417,637.39

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Double scale
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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.