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Finding the Fourth Proportional to 328,009.60, 491,625.60 and 138,469.60

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Solution

The fourth proportional to 328,009.60, 491,625.60 and 138,469.60 is: 207,540.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,009.60 : 491,625.60 = 138,469.60 : x
  2. Step 2: Convert to fraction form
    328,009.60/491,625.60 = 138,469.60/x
  3. Step 3: Cross multiply
    328,009.60x = 491,625.60 × 138,469.60
  4. Step 4: Simplify right side
    328,009.60x = 68,075,200,181.76
  5. Step 5: Solve for x
    x = 68,075,200,181.76/328,009.60
  6. Step 6: Final answer
    x = 207,540.27

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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.