Home / 2,989.30-4,125.46-1,730.78

Finding the Fourth Proportional to 2,989.30, 4,125.46 and 1,730.78

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Solution

The fourth proportional to 2,989.30, 4,125.46 and 1,730.78 is: 2,388.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.30 : 4,125.46 = 1,730.78 : x
  2. Step 2: Convert to fraction form
    2,989.30/4,125.46 = 1,730.78/x
  3. Step 3: Cross multiply
    2,989.30x = 4,125.46 × 1,730.78
  4. Step 4: Simplify right side
    2,989.30x = 7,140,263.66
  5. Step 5: Solve for x
    x = 7,140,263.66/2,989.30
  6. Step 6: Final answer
    x = 2,388.61

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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.