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Finding the Fourth Proportional to 1,173.72, 1,619.85 and 676.41

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Solution

The fourth proportional to 1,173.72, 1,619.85 and 676.41 is: 933.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.72 : 1,619.85 = 676.41 : x
  2. Step 2: Convert to fraction form
    1,173.72/1,619.85 = 676.41/x
  3. Step 3: Cross multiply
    1,173.72x = 1,619.85 × 676.41
  4. Step 4: Simplify right side
    1,173.72x = 1,095,682.74
  5. Step 5: Solve for x
    x = 1,095,682.74/1,173.72
  6. Step 6: Final answer
    x = 933.51

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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.