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Finding the Fourth Proportional to 421,083.90, 631,628.58 and 168,385.68

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Solution

The fourth proportional to 421,083.90, 631,628.58 and 168,385.68 is: 252,579.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,083.90 : 631,628.58 = 168,385.68 : x
  2. Step 2: Convert to fraction form
    421,083.90/631,628.58 = 168,385.68/x
  3. Step 3: Cross multiply
    421,083.90x = 631,628.58 × 168,385.68
  4. Step 4: Simplify right side
    421,083.90x = 106,357,207,950.73
  5. Step 5: Solve for x
    x = 106,357,207,950.73/421,083.90
  6. Step 6: Final answer
    x = 252,579.61

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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.