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Finding the Fourth Proportional to 1,329, 1,830.84 and 1,079.64

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Solution

The fourth proportional to 1,329, 1,830.84 and 1,079.64 is: 1,487.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329 : 1,830.84 = 1,079.64 : x
  2. Step 2: Convert to fraction form
    1,329/1,830.84 = 1,079.64/x
  3. Step 3: Cross multiply
    1,329x = 1,830.84 × 1,079.64
  4. Step 4: Simplify right side
    1,329x = 1,976,648.10
  5. Step 5: Solve for x
    x = 1,976,648.10/1,329
  6. Step 6: Final answer
    x = 1,487.32

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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.