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Finding the Fourth Proportional to 858.98, 1,185 and 504.90

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Solution

The fourth proportional to 858.98, 1,185 and 504.90 is: 696.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.98 : 1,185 = 504.90 : x
  2. Step 2: Convert to fraction form
    858.98/1,185 = 504.90/x
  3. Step 3: Cross multiply
    858.98x = 1,185 × 504.90
  4. Step 4: Simplify right side
    858.98x = 598,306.50
  5. Step 5: Solve for x
    x = 598,306.50/858.98
  6. Step 6: Final answer
    x = 696.53

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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.