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Finding the Fourth Proportional to 2,079.81, 3,119.71 and 846.93

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Solution

The fourth proportional to 2,079.81, 3,119.71 and 846.93 is: 1,270.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.81 : 3,119.71 = 846.93 : x
  2. Step 2: Convert to fraction form
    2,079.81/3,119.71 = 846.93/x
  3. Step 3: Cross multiply
    2,079.81x = 3,119.71 × 846.93
  4. Step 4: Simplify right side
    2,079.81x = 2,642,175.99
  5. Step 5: Solve for x
    x = 2,642,175.99/2,079.81
  6. Step 6: Final answer
    x = 1,270.39

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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.