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Finding the Fourth Proportional to 559.75, 772.63 and 412.81

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Solution

The fourth proportional to 559.75, 772.63 and 412.81 is: 569.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.75 : 772.63 = 412.81 : x
  2. Step 2: Convert to fraction form
    559.75/772.63 = 412.81/x
  3. Step 3: Cross multiply
    559.75x = 772.63 × 412.81
  4. Step 4: Simplify right side
    559.75x = 318,949.39
  5. Step 5: Solve for x
    x = 318,949.39/559.75
  6. Step 6: Final answer
    x = 569.81

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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.