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Finding the Fourth Proportional to 2,175.72, 3,263.64 and 636.72

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Solution

The fourth proportional to 2,175.72, 3,263.64 and 636.72 is: 955.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.72 : 3,263.64 = 636.72 : x
  2. Step 2: Convert to fraction form
    2,175.72/3,263.64 = 636.72/x
  3. Step 3: Cross multiply
    2,175.72x = 3,263.64 × 636.72
  4. Step 4: Simplify right side
    2,175.72x = 2,078,024.86
  5. Step 5: Solve for x
    x = 2,078,024.86/2,175.72
  6. Step 6: Final answer
    x = 955.10

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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.