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Finding the Fourth Proportional to 2,140.40, 3,203.40 and 1,492.40

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Solution

The fourth proportional to 2,140.40, 3,203.40 and 1,492.40 is: 2,233.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.40 : 3,203.40 = 1,492.40 : x
  2. Step 2: Convert to fraction form
    2,140.40/3,203.40 = 1,492.40/x
  3. Step 3: Cross multiply
    2,140.40x = 3,203.40 × 1,492.40
  4. Step 4: Simplify right side
    2,140.40x = 4,780,754.16
  5. Step 5: Solve for x
    x = 4,780,754.16/2,140.40
  6. Step 6: Final answer
    x = 2,233.58

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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.