Home / 2,989.85-4,126.50-1,730.70

Finding the Fourth Proportional to 2,989.85, 4,126.50 and 1,730.70

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Solution

The fourth proportional to 2,989.85, 4,126.50 and 1,730.70 is: 2,388.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.85 : 4,126.50 = 1,730.70 : x
  2. Step 2: Convert to fraction form
    2,989.85/4,126.50 = 1,730.70/x
  3. Step 3: Cross multiply
    2,989.85x = 4,126.50 × 1,730.70
  4. Step 4: Simplify right side
    2,989.85x = 7,141,733.55
  5. Step 5: Solve for x
    x = 7,141,733.55/2,989.85
  6. Step 6: Final answer
    x = 2,388.66

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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.