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Finding the Fourth Proportional to 1,167.51, 1,749.54 and 646.88

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Solution

The fourth proportional to 1,167.51, 1,749.54 and 646.88 is: 969.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.51 : 1,749.54 = 646.88 : x
  2. Step 2: Convert to fraction form
    1,167.51/1,749.54 = 646.88/x
  3. Step 3: Cross multiply
    1,167.51x = 1,749.54 × 646.88
  4. Step 4: Simplify right side
    1,167.51x = 1,131,742.44
  5. Step 5: Solve for x
    x = 1,131,742.44/1,167.51
  6. Step 6: Final answer
    x = 969.36

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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.