Home / 3,139.30-4,712.19-1,678.06

Finding the Fourth Proportional to 3,139.30, 4,712.19 and 1,678.06

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Solution

The fourth proportional to 3,139.30, 4,712.19 and 1,678.06 is: 2,518.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.30 : 4,712.19 = 1,678.06 : x
  2. Step 2: Convert to fraction form
    3,139.30/4,712.19 = 1,678.06/x
  3. Step 3: Cross multiply
    3,139.30x = 4,712.19 × 1,678.06
  4. Step 4: Simplify right side
    3,139.30x = 7,907,337.55
  5. Step 5: Solve for x
    x = 7,907,337.55/3,139.30
  6. Step 6: Final answer
    x = 2,518.82

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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.