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Finding the Fourth Proportional to 306,663.80, 423,063.07 and 216,005.36

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Solution

The fourth proportional to 306,663.80, 423,063.07 and 216,005.36 is: 297,993.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,663.80 : 423,063.07 = 216,005.36 : x
  2. Step 2: Convert to fraction form
    306,663.80/423,063.07 = 216,005.36/x
  3. Step 3: Cross multiply
    306,663.80x = 423,063.07 × 216,005.36
  4. Step 4: Simplify right side
    306,663.80x = 91,383,888,082.73
  5. Step 5: Solve for x
    x = 91,383,888,082.73/306,663.80
  6. Step 6: Final answer
    x = 297,993.73

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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.