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Finding the Fourth Proportional to 500,546.39, 690,715.76 and 285,657.44

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Solution

The fourth proportional to 500,546.39, 690,715.76 and 285,657.44 is: 394,185.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,546.39 : 690,715.76 = 285,657.44 : x
  2. Step 2: Convert to fraction form
    500,546.39/690,715.76 = 285,657.44/x
  3. Step 3: Cross multiply
    500,546.39x = 690,715.76 × 285,657.44
  4. Step 4: Simplify right side
    500,546.39x = 197,308,090,887.39
  5. Step 5: Solve for x
    x = 197,308,090,887.39/500,546.39
  6. Step 6: Final answer
    x = 394,185.43

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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.