Home / 428,181.93-642,287.48-203,426.37

Finding the Fourth Proportional to 428,181.93, 642,287.48 and 203,426.37

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Solution

The fourth proportional to 428,181.93, 642,287.48 and 203,426.37 is: 305,146.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,181.93 : 642,287.48 = 203,426.37 : x
  2. Step 2: Convert to fraction form
    428,181.93/642,287.48 = 203,426.37/x
  3. Step 3: Cross multiply
    428,181.93x = 642,287.48 × 203,426.37
  4. Step 4: Simplify right side
    428,181.93x = 130,658,209,535.72
  5. Step 5: Solve for x
    x = 130,658,209,535.72/428,181.93
  6. Step 6: Final answer
    x = 305,146.48

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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.