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Finding the Fourth Proportional to 405,315.28, 607,644.67 and 168,834.97

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Solution

The fourth proportional to 405,315.28, 607,644.67 and 168,834.97 is: 253,115.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,315.28 : 607,644.67 = 168,834.97 : x
  2. Step 2: Convert to fraction form
    405,315.28/607,644.67 = 168,834.97/x
  3. Step 3: Cross multiply
    405,315.28x = 607,644.67 × 168,834.97
  4. Step 4: Simplify right side
    405,315.28x = 102,591,669,630.11
  5. Step 5: Solve for x
    x = 102,591,669,630.11/405,315.28
  6. Step 6: Final answer
    x = 253,115.72

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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.