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Finding the Fourth Proportional to 1,093.55, 1,638.40 and 745.77

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Solution

The fourth proportional to 1,093.55, 1,638.40 and 745.77 is: 1,117.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093.55 : 1,638.40 = 745.77 : x
  2. Step 2: Convert to fraction form
    1,093.55/1,638.40 = 745.77/x
  3. Step 3: Cross multiply
    1,093.55x = 1,638.40 × 745.77
  4. Step 4: Simplify right side
    1,093.55x = 1,221,869.57
  5. Step 5: Solve for x
    x = 1,221,869.57/1,093.55
  6. Step 6: Final answer
    x = 1,117.34

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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.