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Finding the Fourth Proportional to 421,064.70, 631,599.80 and 168,366.42

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Solution

The fourth proportional to 421,064.70, 631,599.80 and 168,366.42 is: 252,550.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,064.70 : 631,599.80 = 168,366.42 : x
  2. Step 2: Convert to fraction form
    421,064.70/631,599.80 = 168,366.42/x
  3. Step 3: Cross multiply
    421,064.70x = 631,599.80 × 168,366.42
  4. Step 4: Simplify right side
    421,064.70x = 106,340,197,198.72
  5. Step 5: Solve for x
    x = 106,340,197,198.72/421,064.70
  6. Step 6: Final answer
    x = 252,550.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.