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Finding the Fourth Proportional to 1,211.99, 1,818.07 and 346.37

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Solution

The fourth proportional to 1,211.99, 1,818.07 and 346.37 is: 519.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.99 : 1,818.07 = 346.37 : x
  2. Step 2: Convert to fraction form
    1,211.99/1,818.07 = 346.37/x
  3. Step 3: Cross multiply
    1,211.99x = 1,818.07 × 346.37
  4. Step 4: Simplify right side
    1,211.99x = 629,714.95
  5. Step 5: Solve for x
    x = 629,714.95/1,211.99
  6. Step 6: Final answer
    x = 519.57

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Double scale
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1.5x scale

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.