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Finding the Fourth Proportional to 216,427.30, 324,640.95 and 163,939.30

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Solution

The fourth proportional to 216,427.30, 324,640.95 and 163,939.30 is: 245,908.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,427.30 : 324,640.95 = 163,939.30 : x
  2. Step 2: Convert to fraction form
    216,427.30/324,640.95 = 163,939.30/x
  3. Step 3: Cross multiply
    216,427.30x = 324,640.95 × 163,939.30
  4. Step 4: Simplify right side
    216,427.30x = 53,221,410,094.34
  5. Step 5: Solve for x
    x = 53,221,410,094.34/216,427.30
  6. Step 6: Final answer
    x = 245,908.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.