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Finding the Fourth Proportional to 405,143.80, 607,229.70 and 168,364.60

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Solution

The fourth proportional to 405,143.80, 607,229.70 and 168,364.60 is: 252,344.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,143.80 : 607,229.70 = 168,364.60 : x
  2. Step 2: Convert to fraction form
    405,143.80/607,229.70 = 168,364.60/x
  3. Step 3: Cross multiply
    405,143.80x = 607,229.70 × 168,364.60
  4. Step 4: Simplify right side
    405,143.80x = 102,235,985,548.62
  5. Step 5: Solve for x
    x = 102,235,985,548.62/405,143.80
  6. Step 6: Final answer
    x = 252,344.93

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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.