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Finding the Fourth Proportional to 2,343.62, 3,515.71 and 783.83

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Solution

The fourth proportional to 2,343.62, 3,515.71 and 783.83 is: 1,175.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,343.62 : 3,515.71 = 783.83 : x
  2. Step 2: Convert to fraction form
    2,343.62/3,515.71 = 783.83/x
  3. Step 3: Cross multiply
    2,343.62x = 3,515.71 × 783.83
  4. Step 4: Simplify right side
    2,343.62x = 2,755,727.27
  5. Step 5: Solve for x
    x = 2,755,727.27/2,343.62
  6. Step 6: Final answer
    x = 1,175.84

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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.