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Finding the Fourth Proportional to 326,018.88, 488,986.74 and 126,202.55

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Solution

The fourth proportional to 326,018.88, 488,986.74 and 126,202.55 is: 189,287.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,018.88 : 488,986.74 = 126,202.55 : x
  2. Step 2: Convert to fraction form
    326,018.88/488,986.74 = 126,202.55/x
  3. Step 3: Cross multiply
    326,018.88x = 488,986.74 × 126,202.55
  4. Step 4: Simplify right side
    326,018.88x = 61,711,371,059.25
  5. Step 5: Solve for x
    x = 61,711,371,059.25/326,018.88
  6. Step 6: Final answer
    x = 189,287.72

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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.