Home / 428,563.36-642,718.32-162,126.24

Finding the Fourth Proportional to 428,563.36, 642,718.32 and 162,126.24

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Solution

The fourth proportional to 428,563.36, 642,718.32 and 162,126.24 is: 243,141.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,563.36 : 642,718.32 = 162,126.24 : x
  2. Step 2: Convert to fraction form
    428,563.36/642,718.32 = 162,126.24/x
  3. Step 3: Cross multiply
    428,563.36x = 642,718.32 × 162,126.24
  4. Step 4: Simplify right side
    428,563.36x = 104,201,504,600.72
  5. Step 5: Solve for x
    x = 104,201,504,600.72/428,563.36
  6. Step 6: Final answer
    x = 243,141.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.