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Finding the Fourth Proportional to 428,527.12, 642,157.16 and 404,563.12

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Solution

The fourth proportional to 428,527.12, 642,157.16 and 404,563.12 is: 606,246.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,527.12 : 642,157.16 = 404,563.12 : x
  2. Step 2: Convert to fraction form
    428,527.12/642,157.16 = 404,563.12/x
  3. Step 3: Cross multiply
    428,527.12x = 642,157.16 × 404,563.12
  4. Step 4: Simplify right side
    428,527.12x = 259,793,104,179.94
  5. Step 5: Solve for x
    x = 259,793,104,179.94/428,527.12
  6. Step 6: Final answer
    x = 606,246.59

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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.