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Finding the Fourth Proportional to 1,086.26, 1,498.92 and 620.42

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Solution

The fourth proportional to 1,086.26, 1,498.92 and 620.42 is: 856.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.26 : 1,498.92 = 620.42 : x
  2. Step 2: Convert to fraction form
    1,086.26/1,498.92 = 620.42/x
  3. Step 3: Cross multiply
    1,086.26x = 1,498.92 × 620.42
  4. Step 4: Simplify right side
    1,086.26x = 929,959.95
  5. Step 5: Solve for x
    x = 929,959.95/1,086.26
  6. Step 6: Final answer
    x = 856.11

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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.