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Finding the Fourth Proportional to 353,483.42, 487,621.23 and 210,141.50

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Solution

The fourth proportional to 353,483.42, 487,621.23 and 210,141.50 is: 289,884.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,483.42 : 487,621.23 = 210,141.50 : x
  2. Step 2: Convert to fraction form
    353,483.42/487,621.23 = 210,141.50/x
  3. Step 3: Cross multiply
    353,483.42x = 487,621.23 × 210,141.50
  4. Step 4: Simplify right side
    353,483.42x = 102,469,456,704.05
  5. Step 5: Solve for x
    x = 102,469,456,704.05/353,483.42
  6. Step 6: Final answer
    x = 289,884.76

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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.