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Finding the Fourth Proportional to 449,745.42, 620,588.72 and 288,818.45

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Solution

The fourth proportional to 449,745.42, 620,588.72 and 288,818.45 is: 398,530.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,745.42 : 620,588.72 = 288,818.45 : x
  2. Step 2: Convert to fraction form
    449,745.42/620,588.72 = 288,818.45/x
  3. Step 3: Cross multiply
    449,745.42x = 620,588.72 × 288,818.45
  4. Step 4: Simplify right side
    449,745.42x = 179,237,467,650.85
  5. Step 5: Solve for x
    x = 179,237,467,650.85/449,745.42
  6. Step 6: Final answer
    x = 398,530.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.