Home / 405,968.24-560,771.64-311,640.56

Finding the Fourth Proportional to 405,968.24, 560,771.64 and 311,640.56

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Solution

The fourth proportional to 405,968.24, 560,771.64 and 311,640.56 is: 430,475.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,968.24 : 560,771.64 = 311,640.56 : x
  2. Step 2: Convert to fraction form
    405,968.24/560,771.64 = 311,640.56/x
  3. Step 3: Cross multiply
    405,968.24x = 560,771.64 × 311,640.56
  4. Step 4: Simplify right side
    405,968.24x = 174,759,187,921.72
  5. Step 5: Solve for x
    x = 174,759,187,921.72/405,968.24
  6. Step 6: Final answer
    x = 430,475.02

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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.