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Finding the Fourth Proportional to 512,455.90, 768,683.85 and 228,145.90

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Solution

The fourth proportional to 512,455.90, 768,683.85 and 228,145.90 is: 342,218.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,455.90 : 768,683.85 = 228,145.90 : x
  2. Step 2: Convert to fraction form
    512,455.90/768,683.85 = 228,145.90/x
  3. Step 3: Cross multiply
    512,455.90x = 768,683.85 × 228,145.90
  4. Step 4: Simplify right side
    512,455.90x = 175,372,068,773.72
  5. Step 5: Solve for x
    x = 175,372,068,773.72/512,455.90
  6. Step 6: Final answer
    x = 342,218.85

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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.