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Finding the Fourth Proportional to 326,631.63, 489,978.36 and 126,967.44

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Solution

The fourth proportional to 326,631.63, 489,978.36 and 126,967.44 is: 190,463.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,631.63 : 489,978.36 = 126,967.44 : x
  2. Step 2: Convert to fraction form
    326,631.63/489,978.36 = 126,967.44/x
  3. Step 3: Cross multiply
    326,631.63x = 489,978.36 × 126,967.44
  4. Step 4: Simplify right side
    326,631.63x = 62,211,298,024.60
  5. Step 5: Solve for x
    x = 62,211,298,024.60/326,631.63
  6. Step 6: Final answer
    x = 190,463.18

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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.