Home / 3,139.51-4,708.45-1,492.78

Finding the Fourth Proportional to 3,139.51, 4,708.45 and 1,492.78

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Solution

The fourth proportional to 3,139.51, 4,708.45 and 1,492.78 is: 2,238.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.51 : 4,708.45 = 1,492.78 : x
  2. Step 2: Convert to fraction form
    3,139.51/4,708.45 = 1,492.78/x
  3. Step 3: Cross multiply
    3,139.51x = 4,708.45 × 1,492.78
  4. Step 4: Simplify right side
    3,139.51x = 7,028,679.99
  5. Step 5: Solve for x
    x = 7,028,679.99/3,139.51
  6. Step 6: Final answer
    x = 2,238.78

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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.