Home / 1,492.24-2,238.30-712.78

Finding the Fourth Proportional to 1,492.24, 2,238.30 and 712.78

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Solution

The fourth proportional to 1,492.24, 2,238.30 and 712.78 is: 1,069.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,492.24 : 2,238.30 = 712.78 : x
  2. Step 2: Convert to fraction form
    1,492.24/2,238.30 = 712.78/x
  3. Step 3: Cross multiply
    1,492.24x = 2,238.30 × 712.78
  4. Step 4: Simplify right side
    1,492.24x = 1,595,415.47
  5. Step 5: Solve for x
    x = 1,595,415.47/1,492.24
  6. Step 6: Final answer
    x = 1,069.14

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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.