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Finding the Fourth Proportional to 1,668.06, 2,501.69 and 693.63

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Solution

The fourth proportional to 1,668.06, 2,501.69 and 693.63 is: 1,040.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.06 : 2,501.69 = 693.63 : x
  2. Step 2: Convert to fraction form
    1,668.06/2,501.69 = 693.63/x
  3. Step 3: Cross multiply
    1,668.06x = 2,501.69 × 693.63
  4. Step 4: Simplify right side
    1,668.06x = 1,735,243.77
  5. Step 5: Solve for x
    x = 1,735,243.77/1,668.06
  6. Step 6: Final answer
    x = 1,040.28

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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.