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Finding the Fourth Proportional to 492,659.57, 679,887 and 285,912.05

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Solution

The fourth proportional to 492,659.57, 679,887 and 285,912.05 is: 394,568.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,659.57 : 679,887 = 285,912.05 : x
  2. Step 2: Convert to fraction form
    492,659.57/679,887 = 285,912.05/x
  3. Step 3: Cross multiply
    492,659.57x = 679,887 × 285,912.05
  4. Step 4: Simplify right side
    492,659.57x = 194,387,882,538.92
  5. Step 5: Solve for x
    x = 194,387,882,538.92/492,659.57
  6. Step 6: Final answer
    x = 394,568.37

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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.