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Finding the Fourth Proportional to 428,293.36, 642,190.96 and 162,074.40

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Solution

The fourth proportional to 428,293.36, 642,190.96 and 162,074.40 is: 243,017.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,293.36 : 642,190.96 = 162,074.40 : x
  2. Step 2: Convert to fraction form
    428,293.36/642,190.96 = 162,074.40/x
  3. Step 3: Cross multiply
    428,293.36x = 642,190.96 × 162,074.40
  4. Step 4: Simplify right side
    428,293.36x = 104,082,714,527.42
  5. Step 5: Solve for x
    x = 104,082,714,527.42/428,293.36
  6. Step 6: Final answer
    x = 243,017.34

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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.