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Finding the Fourth Proportional to 387,074.40, 580,611.60 and 328,171.20

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Solution

The fourth proportional to 387,074.40, 580,611.60 and 328,171.20 is: 492,256.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,074.40 : 580,611.60 = 328,171.20 : x
  2. Step 2: Convert to fraction form
    387,074.40/580,611.60 = 328,171.20/x
  3. Step 3: Cross multiply
    387,074.40x = 580,611.60 × 328,171.20
  4. Step 4: Simplify right side
    387,074.40x = 190,540,005,505.92
  5. Step 5: Solve for x
    x = 190,540,005,505.92/387,074.40
  6. Step 6: Final answer
    x = 492,256.80

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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.