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Finding the Fourth Proportional to 561.55, 774.75 and 348.70

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Solution

The fourth proportional to 561.55, 774.75 and 348.70 is: 481.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.55 : 774.75 = 348.70 : x
  2. Step 2: Convert to fraction form
    561.55/774.75 = 348.70/x
  3. Step 3: Cross multiply
    561.55x = 774.75 × 348.70
  4. Step 4: Simplify right side
    561.55x = 270,155.33
  5. Step 5: Solve for x
    x = 270,155.33/561.55
  6. Step 6: Final answer
    x = 481.09

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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.