Home / 428,970.60-643,567.68-162,736.56

Finding the Fourth Proportional to 428,970.60, 643,567.68 and 162,736.56

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Solution

The fourth proportional to 428,970.60, 643,567.68 and 162,736.56 is: 244,147.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,970.60 : 643,567.68 = 162,736.56 : x
  2. Step 2: Convert to fraction form
    428,970.60/643,567.68 = 162,736.56/x
  3. Step 3: Cross multiply
    428,970.60x = 643,567.68 × 162,736.56
  4. Step 4: Simplify right side
    428,970.60x = 104,731,990,370.38
  5. Step 5: Solve for x
    x = 104,731,990,370.38/428,970.60
  6. Step 6: Final answer
    x = 244,147.25

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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.