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Finding the Fourth Proportional to 1,374.79, 1,897.21 and 745.32

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Solution

The fourth proportional to 1,374.79, 1,897.21 and 745.32 is: 1,028.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.79 : 1,897.21 = 745.32 : x
  2. Step 2: Convert to fraction form
    1,374.79/1,897.21 = 745.32/x
  3. Step 3: Cross multiply
    1,374.79x = 1,897.21 × 745.32
  4. Step 4: Simplify right side
    1,374.79x = 1,414,021.74
  5. Step 5: Solve for x
    x = 1,414,021.74/1,374.79
  6. Step 6: Final answer
    x = 1,028.54

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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.