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Finding the Fourth Proportional to 1,091.67, 1,637.77 and 475.21

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Solution

The fourth proportional to 1,091.67, 1,637.77 and 475.21 is: 712.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.67 : 1,637.77 = 475.21 : x
  2. Step 2: Convert to fraction form
    1,091.67/1,637.77 = 475.21/x
  3. Step 3: Cross multiply
    1,091.67x = 1,637.77 × 475.21
  4. Step 4: Simplify right side
    1,091.67x = 778,284.68
  5. Step 5: Solve for x
    x = 778,284.68/1,091.67
  6. Step 6: Final answer
    x = 712.93

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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.