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Finding the Fourth Proportional to 309,379.40, 426,847.73 and 173,394.47

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Solution

The fourth proportional to 309,379.40, 426,847.73 and 173,394.47 is: 239,230.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,379.40 : 426,847.73 = 173,394.47 : x
  2. Step 2: Convert to fraction form
    309,379.40/426,847.73 = 173,394.47/x
  3. Step 3: Cross multiply
    309,379.40x = 426,847.73 × 173,394.47
  4. Step 4: Simplify right side
    309,379.40x = 74,013,036,114.20
  5. Step 5: Solve for x
    x = 74,013,036,114.20/309,379.40
  6. Step 6: Final answer
    x = 239,230.65

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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.