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Finding the Fourth Proportional to 303,423.47, 418,881.75 and 221,659.88

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Solution

The fourth proportional to 303,423.47, 418,881.75 and 221,659.88 is: 306,005.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,423.47 : 418,881.75 = 221,659.88 : x
  2. Step 2: Convert to fraction form
    303,423.47/418,881.75 = 221,659.88/x
  3. Step 3: Cross multiply
    303,423.47x = 418,881.75 × 221,659.88
  4. Step 4: Simplify right side
    303,423.47x = 92,849,275,513.56
  5. Step 5: Solve for x
    x = 92,849,275,513.56/303,423.47
  6. Step 6: Final answer
    x = 306,005.58

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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.