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Finding the Fourth Proportional to 4,681.90, 7,021.26 and 1,719.64

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Solution

The fourth proportional to 4,681.90, 7,021.26 and 1,719.64 is: 2,578.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,681.90 : 7,021.26 = 1,719.64 : x
  2. Step 2: Convert to fraction form
    4,681.90/7,021.26 = 1,719.64/x
  3. Step 3: Cross multiply
    4,681.90x = 7,021.26 × 1,719.64
  4. Step 4: Simplify right side
    4,681.90x = 12,074,039.55
  5. Step 5: Solve for x
    x = 12,074,039.55/4,681.90
  6. Step 6: Final answer
    x = 2,578.88

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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.