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Finding the Fourth Proportional to 351,728.82, 527,588.46 and 85,488.54

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Solution

The fourth proportional to 351,728.82, 527,588.46 and 85,488.54 is: 128,231.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,728.82 : 527,588.46 = 85,488.54 : x
  2. Step 2: Convert to fraction form
    351,728.82/527,588.46 = 85,488.54/x
  3. Step 3: Cross multiply
    351,728.82x = 527,588.46 × 85,488.54
  4. Step 4: Simplify right side
    351,728.82x = 45,102,767,166.25
  5. Step 5: Solve for x
    x = 45,102,767,166.25/351,728.82
  6. Step 6: Final answer
    x = 128,231.65

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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.