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Finding the Fourth Proportional to 322,315.44, 483,434.64 and 85,676.28

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Solution

The fourth proportional to 322,315.44, 483,434.64 and 85,676.28 is: 128,504.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,315.44 : 483,434.64 = 85,676.28 : x
  2. Step 2: Convert to fraction form
    322,315.44/483,434.64 = 85,676.28/x
  3. Step 3: Cross multiply
    322,315.44x = 483,434.64 × 85,676.28
  4. Step 4: Simplify right side
    322,315.44x = 41,418,881,578.34
  5. Step 5: Solve for x
    x = 41,418,881,578.34/322,315.44
  6. Step 6: Final answer
    x = 128,504.18

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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.