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Finding the Fourth Proportional to 315,223.78, 435,010.26 and 171,986.80

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Solution

The fourth proportional to 315,223.78, 435,010.26 and 171,986.80 is: 237,342.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,223.78 : 435,010.26 = 171,986.80 : x
  2. Step 2: Convert to fraction form
    315,223.78/435,010.26 = 171,986.80/x
  3. Step 3: Cross multiply
    315,223.78x = 435,010.26 × 171,986.80
  4. Step 4: Simplify right side
    315,223.78x = 74,816,022,584.57
  5. Step 5: Solve for x
    x = 74,816,022,584.57/315,223.78
  6. Step 6: Final answer
    x = 237,342.57

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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.