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Finding the Fourth Proportional to 1,112.75, 1,668.60 and 332.46

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Solution

The fourth proportional to 1,112.75, 1,668.60 and 332.46 is: 498.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.75 : 1,668.60 = 332.46 : x
  2. Step 2: Convert to fraction form
    1,112.75/1,668.60 = 332.46/x
  3. Step 3: Cross multiply
    1,112.75x = 1,668.60 × 332.46
  4. Step 4: Simplify right side
    1,112.75x = 554,742.76
  5. Step 5: Solve for x
    x = 554,742.76/1,112.75
  6. Step 6: Final answer
    x = 498.54

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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.