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Finding the Fourth Proportional to 380,328.21, 570,611.69 and 228,699.86

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Solution

The fourth proportional to 380,328.21, 570,611.69 and 228,699.86 is: 343,121.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,328.21 : 570,611.69 = 228,699.86 : x
  2. Step 2: Convert to fraction form
    380,328.21/570,611.69 = 228,699.86/x
  3. Step 3: Cross multiply
    380,328.21x = 570,611.69 × 228,699.86
  4. Step 4: Simplify right side
    380,328.21x = 130,498,810,478.43
  5. Step 5: Solve for x
    x = 130,498,810,478.43/380,328.21
  6. Step 6: Final answer
    x = 343,121.56

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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.