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Finding the Fourth Proportional to 1,109.23, 1,662.29 and 492.77

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Solution

The fourth proportional to 1,109.23, 1,662.29 and 492.77 is: 738.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.23 : 1,662.29 = 492.77 : x
  2. Step 2: Convert to fraction form
    1,109.23/1,662.29 = 492.77/x
  3. Step 3: Cross multiply
    1,109.23x = 1,662.29 × 492.77
  4. Step 4: Simplify right side
    1,109.23x = 819,126.64
  5. Step 5: Solve for x
    x = 819,126.64/1,109.23
  6. Step 6: Final answer
    x = 738.46

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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.