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Finding the Fourth Proportional to 1,093.58, 1,508.99 and 621.39

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Solution

The fourth proportional to 1,093.58, 1,508.99 and 621.39 is: 857.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093.58 : 1,508.99 = 621.39 : x
  2. Step 2: Convert to fraction form
    1,093.58/1,508.99 = 621.39/x
  3. Step 3: Cross multiply
    1,093.58x = 1,508.99 × 621.39
  4. Step 4: Simplify right side
    1,093.58x = 937,668.19
  5. Step 5: Solve for x
    x = 937,668.19/1,093.58
  6. Step 6: Final answer
    x = 857.43

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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.