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Finding the Fourth Proportional to 309,356.61, 426,923.83 and 173,393.04

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Solution

The fourth proportional to 309,356.61, 426,923.83 and 173,393.04 is: 239,288.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,356.61 : 426,923.83 = 173,393.04 : x
  2. Step 2: Convert to fraction form
    309,356.61/426,923.83 = 173,393.04/x
  3. Step 3: Cross multiply
    309,356.61x = 426,923.83 × 173,393.04
  4. Step 4: Simplify right side
    309,356.61x = 74,025,620,732.14
  5. Step 5: Solve for x
    x = 74,025,620,732.14/309,356.61
  6. Step 6: Final answer
    x = 239,288.96

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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.