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Finding the Fourth Proportional to 326,090.80, 489,136.20 and 231,612.40

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Solution

The fourth proportional to 326,090.80, 489,136.20 and 231,612.40 is: 347,418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,090.80 : 489,136.20 = 231,612.40 : x
  2. Step 2: Convert to fraction form
    326,090.80/489,136.20 = 231,612.40/x
  3. Step 3: Cross multiply
    326,090.80x = 489,136.20 × 231,612.40
  4. Step 4: Simplify right side
    326,090.80x = 113,290,009,208.88
  5. Step 5: Solve for x
    x = 113,290,009,208.88/326,090.80
  6. Step 6: Final answer
    x = 347,418.60

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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.