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Finding the Fourth Proportional to 1,699.80, 2,548.10 and 1,329.40

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Solution

The fourth proportional to 1,699.80, 2,548.10 and 1,329.40 is: 1,992.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,699.80 : 2,548.10 = 1,329.40 : x
  2. Step 2: Convert to fraction form
    1,699.80/2,548.10 = 1,329.40/x
  3. Step 3: Cross multiply
    1,699.80x = 2,548.10 × 1,329.40
  4. Step 4: Simplify right side
    1,699.80x = 3,387,444.14
  5. Step 5: Solve for x
    x = 3,387,444.14/1,699.80
  6. Step 6: Final answer
    x = 1,992.85

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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.