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Finding the Fourth Proportional to 1,112.61, 1,668.80 and 332.62

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Solution

The fourth proportional to 1,112.61, 1,668.80 and 332.62 is: 498.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.61 : 1,668.80 = 332.62 : x
  2. Step 2: Convert to fraction form
    1,112.61/1,668.80 = 332.62/x
  3. Step 3: Cross multiply
    1,112.61x = 1,668.80 × 332.62
  4. Step 4: Simplify right side
    1,112.61x = 555,076.26
  5. Step 5: Solve for x
    x = 555,076.26/1,112.61
  6. Step 6: Final answer
    x = 498.90

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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.