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Finding the Fourth Proportional to 559.36, 770 and 485.24

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Solution

The fourth proportional to 559.36, 770 and 485.24 is: 667.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.36 : 770 = 485.24 : x
  2. Step 2: Convert to fraction form
    559.36/770 = 485.24/x
  3. Step 3: Cross multiply
    559.36x = 770 × 485.24
  4. Step 4: Simplify right side
    559.36x = 373,634.80
  5. Step 5: Solve for x
    x = 373,634.80/559.36
  6. Step 6: Final answer
    x = 667.97

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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.