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Finding the Fourth Proportional to 315,112.75, 434,860.72 and 171,872.75

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Solution

The fourth proportional to 315,112.75, 434,860.72 and 171,872.75 is: 237,187.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,112.75 : 434,860.72 = 171,872.75 : x
  2. Step 2: Convert to fraction form
    315,112.75/434,860.72 = 171,872.75/x
  3. Step 3: Cross multiply
    315,112.75x = 434,860.72 × 171,872.75
  4. Step 4: Simplify right side
    315,112.75x = 74,740,708,470.85
  5. Step 5: Solve for x
    x = 74,740,708,470.85/315,112.75
  6. Step 6: Final answer
    x = 237,187.19

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1.5x scale

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.