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Finding the Fourth Proportional to 481,076.51, 663,840.45 and 287,445.65

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Solution

The fourth proportional to 481,076.51, 663,840.45 and 287,445.65 is: 396,648.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,076.51 : 663,840.45 = 287,445.65 : x
  2. Step 2: Convert to fraction form
    481,076.51/663,840.45 = 287,445.65/x
  3. Step 3: Cross multiply
    481,076.51x = 663,840.45 × 287,445.65
  4. Step 4: Simplify right side
    481,076.51x = 190,818,046,327.34
  5. Step 5: Solve for x
    x = 190,818,046,327.34/481,076.51
  6. Step 6: Final answer
    x = 396,648.03

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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.