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Finding the Fourth Proportional to 2,124.38, 3,186.58 and 663.56

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Solution

The fourth proportional to 2,124.38, 3,186.58 and 663.56 is: 995.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.38 : 3,186.58 = 663.56 : x
  2. Step 2: Convert to fraction form
    2,124.38/3,186.58 = 663.56/x
  3. Step 3: Cross multiply
    2,124.38x = 3,186.58 × 663.56
  4. Step 4: Simplify right side
    2,124.38x = 2,114,487.02
  5. Step 5: Solve for x
    x = 2,114,487.02/2,124.38
  6. Step 6: Final answer
    x = 995.34

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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.