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Finding the Fourth Proportional to 305,404.70, 421,478.41 and 176,348.62

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Solution

The fourth proportional to 305,404.70, 421,478.41 and 176,348.62 is: 243,372.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,404.70 : 421,478.41 = 176,348.62 : x
  2. Step 2: Convert to fraction form
    305,404.70/421,478.41 = 176,348.62/x
  3. Step 3: Cross multiply
    305,404.70x = 421,478.41 × 176,348.62
  4. Step 4: Simplify right side
    305,404.70x = 74,327,133,855.90
  5. Step 5: Solve for x
    x = 74,327,133,855.90/305,404.70
  6. Step 6: Final answer
    x = 243,372.59

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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.