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Finding the Fourth Proportional to 1,195.29, 1,790.33 and 646.31

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Solution

The fourth proportional to 1,195.29, 1,790.33 and 646.31 is: 968.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.29 : 1,790.33 = 646.31 : x
  2. Step 2: Convert to fraction form
    1,195.29/1,790.33 = 646.31/x
  3. Step 3: Cross multiply
    1,195.29x = 1,790.33 × 646.31
  4. Step 4: Simplify right side
    1,195.29x = 1,157,109.43
  5. Step 5: Solve for x
    x = 1,157,109.43/1,195.29
  6. Step 6: Final answer
    x = 968.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.