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Finding the Fourth Proportional to 305,585.45, 421,701.89 and 169,621.01

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Solution

The fourth proportional to 305,585.45, 421,701.89 and 169,621.01 is: 234,073.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,585.45 : 421,701.89 = 169,621.01 : x
  2. Step 2: Convert to fraction form
    305,585.45/421,701.89 = 169,621.01/x
  3. Step 3: Cross multiply
    305,585.45x = 421,701.89 × 169,621.01
  4. Step 4: Simplify right side
    305,585.45x = 71,529,500,500.71
  5. Step 5: Solve for x
    x = 71,529,500,500.71/305,585.45
  6. Step 6: Final answer
    x = 234,073.65

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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.