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Finding the Fourth Proportional to 500,548.38, 690,718.52 and 285,659.44

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Solution

The fourth proportional to 500,548.38, 690,718.52 and 285,659.44 is: 394,188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,548.38 : 690,718.52 = 285,659.44 : x
  2. Step 2: Convert to fraction form
    500,548.38/690,718.52 = 285,659.44/x
  3. Step 3: Cross multiply
    500,548.38x = 690,718.52 × 285,659.44
  4. Step 4: Simplify right side
    500,548.38x = 197,310,265,620.83
  5. Step 5: Solve for x
    x = 197,310,265,620.83/500,548.38
  6. Step 6: Final answer
    x = 394,188.20

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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.