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Finding the Fourth Proportional to 1,977.11, 2,963.84 and 745.34

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Solution

The fourth proportional to 1,977.11, 2,963.84 and 745.34 is: 1,117.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.11 : 2,963.84 = 745.34 : x
  2. Step 2: Convert to fraction form
    1,977.11/2,963.84 = 745.34/x
  3. Step 3: Cross multiply
    1,977.11x = 2,963.84 × 745.34
  4. Step 4: Simplify right side
    1,977.11x = 2,209,068.51
  5. Step 5: Solve for x
    x = 2,209,068.51/1,977.11
  6. Step 6: Final answer
    x = 1,117.32

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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.