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Finding the Fourth Proportional to 1,093.94, 1,509.58 and 621.83

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Solution

The fourth proportional to 1,093.94, 1,509.58 and 621.83 is: 858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093.94 : 1,509.58 = 621.83 : x
  2. Step 2: Convert to fraction form
    1,093.94/1,509.58 = 621.83/x
  3. Step 3: Cross multiply
    1,093.94x = 1,509.58 × 621.83
  4. Step 4: Simplify right side
    1,093.94x = 938,706.68
  5. Step 5: Solve for x
    x = 938,706.68/1,093.94
  6. Step 6: Final answer
    x = 858.10

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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.