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Finding the Fourth Proportional to 2,180.63, 3,271.48 and 641.63

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Solution

The fourth proportional to 2,180.63, 3,271.48 and 641.63 is: 962.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,180.63 : 3,271.48 = 641.63 : x
  2. Step 2: Convert to fraction form
    2,180.63/3,271.48 = 641.63/x
  3. Step 3: Cross multiply
    2,180.63x = 3,271.48 × 641.63
  4. Step 4: Simplify right side
    2,180.63x = 2,099,079.71
  5. Step 5: Solve for x
    x = 2,099,079.71/2,180.63
  6. Step 6: Final answer
    x = 962.60

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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.