Home / 428,743.80-642,921.30-162,415.80

Finding the Fourth Proportional to 428,743.80, 642,921.30 and 162,415.80

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Solution

The fourth proportional to 428,743.80, 642,921.30 and 162,415.80 is: 243,550.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,743.80 : 642,921.30 = 162,415.80 : x
  2. Step 2: Convert to fraction form
    428,743.80/642,921.30 = 162,415.80/x
  3. Step 3: Cross multiply
    428,743.80x = 642,921.30 × 162,415.80
  4. Step 4: Simplify right side
    428,743.80x = 104,420,577,276.54
  5. Step 5: Solve for x
    x = 104,420,577,276.54/428,743.80
  6. Step 6: Final answer
    x = 243,550.06

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1.5x scale

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.