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Finding the Fourth Proportional to 561.49, 842.66 and 301.70

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Solution

The fourth proportional to 561.49, 842.66 and 301.70 is: 452.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.49 : 842.66 = 301.70 : x
  2. Step 2: Convert to fraction form
    561.49/842.66 = 301.70/x
  3. Step 3: Cross multiply
    561.49x = 842.66 × 301.70
  4. Step 4: Simplify right side
    561.49x = 254,230.52
  5. Step 5: Solve for x
    x = 254,230.52/561.49
  6. Step 6: Final answer
    x = 452.78

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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.