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Finding the Fourth Proportional to 500,589.06, 690,878.61 and 285,679.86

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Solution

The fourth proportional to 500,589.06, 690,878.61 and 285,679.86 is: 394,275.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,589.06 : 690,878.61 = 285,679.86 : x
  2. Step 2: Convert to fraction form
    500,589.06/690,878.61 = 285,679.86/x
  3. Step 3: Cross multiply
    500,589.06x = 690,878.61 × 285,679.86
  4. Step 4: Simplify right side
    500,589.06x = 197,370,104,581.80
  5. Step 5: Solve for x
    x = 197,370,104,581.80/500,589.06
  6. Step 6: Final answer
    x = 394,275.71

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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.