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Finding the Fourth Proportional to 399,089.89, 550,755.59 and 217,813.37

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Solution

The fourth proportional to 399,089.89, 550,755.59 and 217,813.37 is: 300,588.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,089.89 : 550,755.59 = 217,813.37 : x
  2. Step 2: Convert to fraction form
    399,089.89/550,755.59 = 217,813.37/x
  3. Step 3: Cross multiply
    399,089.89x = 550,755.59 × 217,813.37
  4. Step 4: Simplify right side
    399,089.89x = 119,961,930,015.17
  5. Step 5: Solve for x
    x = 119,961,930,015.17/399,089.89
  6. Step 6: Final answer
    x = 300,588.75

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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.