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Finding the Fourth Proportional to 1,214.98, 1,676.82 and 684.06

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Solution

The fourth proportional to 1,214.98, 1,676.82 and 684.06 is: 944.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.98 : 1,676.82 = 684.06 : x
  2. Step 2: Convert to fraction form
    1,214.98/1,676.82 = 684.06/x
  3. Step 3: Cross multiply
    1,214.98x = 1,676.82 × 684.06
  4. Step 4: Simplify right side
    1,214.98x = 1,147,039.14
  5. Step 5: Solve for x
    x = 1,147,039.14/1,214.98
  6. Step 6: Final answer
    x = 944.08

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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.