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Finding the Fourth Proportional to 399,084.48, 550,745.28 and 217,797.12

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Solution

The fourth proportional to 399,084.48, 550,745.28 and 217,797.12 is: 300,564.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,084.48 : 550,745.28 = 217,797.12 : x
  2. Step 2: Convert to fraction form
    399,084.48/550,745.28 = 217,797.12/x
  3. Step 3: Cross multiply
    399,084.48x = 550,745.28 × 217,797.12
  4. Step 4: Simplify right side
    399,084.48x = 119,950,735,837.59
  5. Step 5: Solve for x
    x = 119,950,735,837.59/399,084.48
  6. Step 6: Final answer
    x = 300,564.77

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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.