Home / 1,806.39-2,492.10-1,217.31

Finding the Fourth Proportional to 1,806.39, 2,492.10 and 1,217.31

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Solution

The fourth proportional to 1,806.39, 2,492.10 and 1,217.31 is: 1,679.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.39 : 2,492.10 = 1,217.31 : x
  2. Step 2: Convert to fraction form
    1,806.39/2,492.10 = 1,217.31/x
  3. Step 3: Cross multiply
    1,806.39x = 2,492.10 × 1,217.31
  4. Step 4: Simplify right side
    1,806.39x = 3,033,658.25
  5. Step 5: Solve for x
    x = 3,033,658.25/1,806.39
  6. Step 6: Final answer
    x = 1,679.40

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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.