Home / 2,180.76-3,271.20-947.40

Finding the Fourth Proportional to 2,180.76, 3,271.20 and 947.40

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Solution

The fourth proportional to 2,180.76, 3,271.20 and 947.40 is: 1,421.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,180.76 : 3,271.20 = 947.40 : x
  2. Step 2: Convert to fraction form
    2,180.76/3,271.20 = 947.40/x
  3. Step 3: Cross multiply
    2,180.76x = 3,271.20 × 947.40
  4. Step 4: Simplify right side
    2,180.76x = 3,099,134.88
  5. Step 5: Solve for x
    x = 3,099,134.88/2,180.76
  6. Step 6: Final answer
    x = 1,421.13

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1.5x scale

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.