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Finding the Fourth Proportional to 1,195.30, 1,649.43 and 671.20

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Solution

The fourth proportional to 1,195.30, 1,649.43 and 671.20 is: 926.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.30 : 1,649.43 = 671.20 : x
  2. Step 2: Convert to fraction form
    1,195.30/1,649.43 = 671.20/x
  3. Step 3: Cross multiply
    1,195.30x = 1,649.43 × 671.20
  4. Step 4: Simplify right side
    1,195.30x = 1,107,097.42
  5. Step 5: Solve for x
    x = 1,107,097.42/1,195.30
  6. Step 6: Final answer
    x = 926.21

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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.