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Finding the Fourth Proportional to 857.03, 1,285.27 and 336.65

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Solution

The fourth proportional to 857.03, 1,285.27 and 336.65 is: 504.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.03 : 1,285.27 = 336.65 : x
  2. Step 2: Convert to fraction form
    857.03/1,285.27 = 336.65/x
  3. Step 3: Cross multiply
    857.03x = 1,285.27 × 336.65
  4. Step 4: Simplify right side
    857.03x = 432,678.88
  5. Step 5: Solve for x
    x = 432,678.88/857.03
  6. Step 6: Final answer
    x = 504.86

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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.