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Finding the Fourth Proportional to 1,522, 2,109.94 and 1,438.84

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Solution

The fourth proportional to 1,522, 2,109.94 and 1,438.84 is: 1,994.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,522 : 2,109.94 = 1,438.84 : x
  2. Step 2: Convert to fraction form
    1,522/2,109.94 = 1,438.84/x
  3. Step 3: Cross multiply
    1,522x = 2,109.94 × 1,438.84
  4. Step 4: Simplify right side
    1,522x = 3,035,866.07
  5. Step 5: Solve for x
    x = 3,035,866.07/1,522
  6. Step 6: Final answer
    x = 1,994.66

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.