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Finding the Fourth Proportional to 388,517.56, 536,146.16 and 216,435.29

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Solution

The fourth proportional to 388,517.56, 536,146.16 and 216,435.29 is: 298,676.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,517.56 : 536,146.16 = 216,435.29 : x
  2. Step 2: Convert to fraction form
    388,517.56/536,146.16 = 216,435.29/x
  3. Step 3: Cross multiply
    388,517.56x = 536,146.16 × 216,435.29
  4. Step 4: Simplify right side
    388,517.56x = 116,040,945,859.08
  5. Step 5: Solve for x
    x = 116,040,945,859.08/388,517.56
  6. Step 6: Final answer
    x = 298,676.20

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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.