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Finding the Fourth Proportional to 351,883.31, 527,817.57 and 85,645.31

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Solution

The fourth proportional to 351,883.31, 527,817.57 and 85,645.31 is: 128,466.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,883.31 : 527,817.57 = 85,645.31 : x
  2. Step 2: Convert to fraction form
    351,883.31/527,817.57 = 85,645.31/x
  3. Step 3: Cross multiply
    351,883.31x = 527,817.57 × 85,645.31
  4. Step 4: Simplify right side
    351,883.31x = 45,205,099,406.10
  5. Step 5: Solve for x
    x = 45,205,099,406.10/351,883.31
  6. Step 6: Final answer
    x = 128,466.17

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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.