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Finding the Fourth Proportional to 316,591.80, 436,896.72 and 173,360.64

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Solution

The fourth proportional to 316,591.80, 436,896.72 and 173,360.64 is: 239,237.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,591.80 : 436,896.72 = 173,360.64 : x
  2. Step 2: Convert to fraction form
    316,591.80/436,896.72 = 173,360.64/x
  3. Step 3: Cross multiply
    316,591.80x = 436,896.72 × 173,360.64
  4. Step 4: Simplify right side
    316,591.80x = 75,740,694,993.10
  5. Step 5: Solve for x
    x = 75,740,694,993.10/316,591.80
  6. Step 6: Final answer
    x = 239,237.70

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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.