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Finding the Fourth Proportional to 839,472.40, 1,259,093.40 and 278,448.40

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Solution

The fourth proportional to 839,472.40, 1,259,093.40 and 278,448.40 is: 417,634.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,472.40 : 1,259,093.40 = 278,448.40 : x
  2. Step 2: Convert to fraction form
    839,472.40/1,259,093.40 = 278,448.40/x
  3. Step 3: Cross multiply
    839,472.40x = 1,259,093.40 × 278,448.40
  4. Step 4: Simplify right side
    839,472.40x = 350,592,542,680.56
  5. Step 5: Solve for x
    x = 350,592,542,680.56/839,472.40
  6. Step 6: Final answer
    x = 417,634.39

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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.