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Finding the Fourth Proportional to 285,958.40, 428,937.60 and 108,406.40

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Solution

The fourth proportional to 285,958.40, 428,937.60 and 108,406.40 is: 162,609.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,958.40 : 428,937.60 = 108,406.40 : x
  2. Step 2: Convert to fraction form
    285,958.40/428,937.60 = 108,406.40/x
  3. Step 3: Cross multiply
    285,958.40x = 428,937.60 × 108,406.40
  4. Step 4: Simplify right side
    285,958.40x = 46,499,581,040.64
  5. Step 5: Solve for x
    x = 46,499,581,040.64/285,958.40
  6. Step 6: Final answer
    x = 162,609.60

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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.