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Finding the Fourth Proportional to 1,195.21, 1,649.40 and 671.29

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Solution

The fourth proportional to 1,195.21, 1,649.40 and 671.29 is: 926.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.21 : 1,649.40 = 671.29 : x
  2. Step 2: Convert to fraction form
    1,195.21/1,649.40 = 671.29/x
  3. Step 3: Cross multiply
    1,195.21x = 1,649.40 × 671.29
  4. Step 4: Simplify right side
    1,195.21x = 1,107,225.73
  5. Step 5: Solve for x
    x = 1,107,225.73/1,195.21
  6. Step 6: Final answer
    x = 926.39

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1.5x scale

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.