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Finding the Fourth Proportional to 2,681.09, 4,020.65 and 925.65

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Solution

The fourth proportional to 2,681.09, 4,020.65 and 925.65 is: 1,388.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,681.09 : 4,020.65 = 925.65 : x
  2. Step 2: Convert to fraction form
    2,681.09/4,020.65 = 925.65/x
  3. Step 3: Cross multiply
    2,681.09x = 4,020.65 × 925.65
  4. Step 4: Simplify right side
    2,681.09x = 3,721,716.99
  5. Step 5: Solve for x
    x = 3,721,716.99/2,681.09
  6. Step 6: Final answer
    x = 1,388.13

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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.