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Finding the Fourth Proportional to 1,323.38, 1,983.15 and 745.02

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Solution

The fourth proportional to 1,323.38, 1,983.15 and 745.02 is: 1,116.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.38 : 1,983.15 = 745.02 : x
  2. Step 2: Convert to fraction form
    1,323.38/1,983.15 = 745.02/x
  3. Step 3: Cross multiply
    1,323.38x = 1,983.15 × 745.02
  4. Step 4: Simplify right side
    1,323.38x = 1,477,486.41
  5. Step 5: Solve for x
    x = 1,477,486.41/1,323.38
  6. Step 6: Final answer
    x = 1,116.45

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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.