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Finding the Fourth Proportional to 1,187.13, 1,638.23 and 795.09

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Solution

The fourth proportional to 1,187.13, 1,638.23 and 795.09 is: 1,097.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.13 : 1,638.23 = 795.09 : x
  2. Step 2: Convert to fraction form
    1,187.13/1,638.23 = 795.09/x
  3. Step 3: Cross multiply
    1,187.13x = 1,638.23 × 795.09
  4. Step 4: Simplify right side
    1,187.13x = 1,302,540.29
  5. Step 5: Solve for x
    x = 1,302,540.29/1,187.13
  6. Step 6: Final answer
    x = 1,097.22

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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.