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Finding the Fourth Proportional to 1,296.10, 1,788.70 and 736.36

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Solution

The fourth proportional to 1,296.10, 1,788.70 and 736.36 is: 1,016.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.10 : 1,788.70 = 736.36 : x
  2. Step 2: Convert to fraction form
    1,296.10/1,788.70 = 736.36/x
  3. Step 3: Cross multiply
    1,296.10x = 1,788.70 × 736.36
  4. Step 4: Simplify right side
    1,296.10x = 1,317,127.13
  5. Step 5: Solve for x
    x = 1,317,127.13/1,296.10
  6. Step 6: Final answer
    x = 1,016.22

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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.