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Finding the Fourth Proportional to 305,628.54, 421,779.60 and 167,812.98

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Solution

The fourth proportional to 305,628.54, 421,779.60 and 167,812.98 is: 231,588.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,628.54 : 421,779.60 = 167,812.98 : x
  2. Step 2: Convert to fraction form
    305,628.54/421,779.60 = 167,812.98/x
  3. Step 3: Cross multiply
    305,628.54x = 421,779.60 × 167,812.98
  4. Step 4: Simplify right side
    305,628.54x = 70,780,091,579.21
  5. Step 5: Solve for x
    x = 70,780,091,579.21/305,628.54
  6. Step 6: Final answer
    x = 231,588.62

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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.