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Finding the Fourth Proportional to 3,614.78, 4,988.33 and 1,958.78

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Solution

The fourth proportional to 3,614.78, 4,988.33 and 1,958.78 is: 2,703.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,614.78 : 4,988.33 = 1,958.78 : x
  2. Step 2: Convert to fraction form
    3,614.78/4,988.33 = 1,958.78/x
  3. Step 3: Cross multiply
    3,614.78x = 4,988.33 × 1,958.78
  4. Step 4: Simplify right side
    3,614.78x = 9,771,041.04
  5. Step 5: Solve for x
    x = 9,771,041.04/3,614.78
  6. Step 6: Final answer
    x = 2,703.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.