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Finding the Fourth Proportional to 1,329.80, 1,994.74 and 464.18

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Solution

The fourth proportional to 1,329.80, 1,994.74 and 464.18 is: 696.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.80 : 1,994.74 = 464.18 : x
  2. Step 2: Convert to fraction form
    1,329.80/1,994.74 = 464.18/x
  3. Step 3: Cross multiply
    1,329.80x = 1,994.74 × 464.18
  4. Step 4: Simplify right side
    1,329.80x = 925,907.28
  5. Step 5: Solve for x
    x = 925,907.28/1,329.80
  6. Step 6: Final answer
    x = 696.28

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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.