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Finding the Fourth Proportional to 449,888.64, 620,785.53 and 288,961.89

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Solution

The fourth proportional to 449,888.64, 620,785.53 and 288,961.89 is: 398,728.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,888.64 : 620,785.53 = 288,961.89 : x
  2. Step 2: Convert to fraction form
    449,888.64/620,785.53 = 288,961.89/x
  3. Step 3: Cross multiply
    449,888.64x = 620,785.53 × 288,961.89
  4. Step 4: Simplify right side
    449,888.64x = 179,383,360,033.45
  5. Step 5: Solve for x
    x = 179,383,360,033.45/449,888.64
  6. Step 6: Final answer
    x = 398,728.36

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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.