Home / 3,145.32-4,717.35-2,989.20

Finding the Fourth Proportional to 3,145.32, 4,717.35 and 2,989.20

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Solution

The fourth proportional to 3,145.32, 4,717.35 and 2,989.20 is: 4,483.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.32 : 4,717.35 = 2,989.20 : x
  2. Step 2: Convert to fraction form
    3,145.32/4,717.35 = 2,989.20/x
  3. Step 3: Cross multiply
    3,145.32x = 4,717.35 × 2,989.20
  4. Step 4: Simplify right side
    3,145.32x = 14,101,102.62
  5. Step 5: Solve for x
    x = 14,101,102.62/3,145.32
  6. Step 6: Final answer
    x = 4,483.20

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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.