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Finding the Fourth Proportional to 1,214.84, 1,676.67 and 772.94

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Solution

The fourth proportional to 1,214.84, 1,676.67 and 772.94 is: 1,066.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.84 : 1,676.67 = 772.94 : x
  2. Step 2: Convert to fraction form
    1,214.84/1,676.67 = 772.94/x
  3. Step 3: Cross multiply
    1,214.84x = 1,676.67 × 772.94
  4. Step 4: Simplify right side
    1,214.84x = 1,295,965.31
  5. Step 5: Solve for x
    x = 1,295,965.31/1,214.84
  6. Step 6: Final answer
    x = 1,066.78

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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.