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Finding the Fourth Proportional to 1,719.26, 2,578.90 and 693.26

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Solution

The fourth proportional to 1,719.26, 2,578.90 and 693.26 is: 1,039.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.26 : 2,578.90 = 693.26 : x
  2. Step 2: Convert to fraction form
    1,719.26/2,578.90 = 693.26/x
  3. Step 3: Cross multiply
    1,719.26x = 2,578.90 × 693.26
  4. Step 4: Simplify right side
    1,719.26x = 1,787,848.21
  5. Step 5: Solve for x
    x = 1,787,848.21/1,719.26
  6. Step 6: Final answer
    x = 1,039.89

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Similar ratio
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1.5x scale

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.