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Finding the Fourth Proportional to 309,361.92, 426,954.78 and 173,432.52

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Solution

The fourth proportional to 309,361.92, 426,954.78 and 173,432.52 is: 239,356.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,361.92 : 426,954.78 = 173,432.52 : x
  2. Step 2: Convert to fraction form
    309,361.92/426,954.78 = 173,432.52/x
  3. Step 3: Cross multiply
    309,361.92x = 426,954.78 × 173,432.52
  4. Step 4: Simplify right side
    309,361.92x = 74,047,843,421.45
  5. Step 5: Solve for x
    x = 74,047,843,421.45/309,361.92
  6. Step 6: Final answer
    x = 239,356.68

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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.