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Finding the Fourth Proportional to 1,672.71, 2,508.16 and 1,328.26

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Solution

The fourth proportional to 1,672.71, 2,508.16 and 1,328.26 is: 1,991.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.71 : 2,508.16 = 1,328.26 : x
  2. Step 2: Convert to fraction form
    1,672.71/2,508.16 = 1,328.26/x
  3. Step 3: Cross multiply
    1,672.71x = 2,508.16 × 1,328.26
  4. Step 4: Simplify right side
    1,672.71x = 3,331,488.60
  5. Step 5: Solve for x
    x = 3,331,488.60/1,672.71
  6. Step 6: Final answer
    x = 1,991.67

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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.