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Finding the Fourth Proportional to 1,091.07, 1,636.96 and 652.25

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Solution

The fourth proportional to 1,091.07, 1,636.96 and 652.25 is: 978.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.07 : 1,636.96 = 652.25 : x
  2. Step 2: Convert to fraction form
    1,091.07/1,636.96 = 652.25/x
  3. Step 3: Cross multiply
    1,091.07x = 1,636.96 × 652.25
  4. Step 4: Simplify right side
    1,091.07x = 1,067,710.84
  5. Step 5: Solve for x
    x = 1,067,710.84/1,091.07
  6. Step 6: Final answer
    x = 978.59

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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.