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Finding the Fourth Proportional to 1,112.50, 1,668.93 and 343.18

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Solution

The fourth proportional to 1,112.50, 1,668.93 and 343.18 is: 514.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.50 : 1,668.93 = 343.18 : x
  2. Step 2: Convert to fraction form
    1,112.50/1,668.93 = 343.18/x
  3. Step 3: Cross multiply
    1,112.50x = 1,668.93 × 343.18
  4. Step 4: Simplify right side
    1,112.50x = 572,743.40
  5. Step 5: Solve for x
    x = 572,743.40/1,112.50
  6. Step 6: Final answer
    x = 514.83

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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.