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Finding the Fourth Proportional to 1,230.82, 1,698.48 and 671.29

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Solution

The fourth proportional to 1,230.82, 1,698.48 and 671.29 is: 926.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.82 : 1,698.48 = 671.29 : x
  2. Step 2: Convert to fraction form
    1,230.82/1,698.48 = 671.29/x
  3. Step 3: Cross multiply
    1,230.82x = 1,698.48 × 671.29
  4. Step 4: Simplify right side
    1,230.82x = 1,140,168.39
  5. Step 5: Solve for x
    x = 1,140,168.39/1,230.82
  6. Step 6: Final answer
    x = 926.35

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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.