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Finding the Fourth Proportional to 682,813.56, 942,142.08 and 392,369.04

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Solution

The fourth proportional to 682,813.56, 942,142.08 and 392,369.04 is: 541,388.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    682,813.56 : 942,142.08 = 392,369.04 : x
  2. Step 2: Convert to fraction form
    682,813.56/942,142.08 = 392,369.04/x
  3. Step 3: Cross multiply
    682,813.56x = 942,142.08 × 392,369.04
  4. Step 4: Simplify right side
    682,813.56x = 369,667,383,473.20
  5. Step 5: Solve for x
    x = 369,667,383,473.20/682,813.56
  6. Step 6: Final answer
    x = 541,388.46

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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.