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Finding the Fourth Proportional to 2,031.55, 3,047.66 and 644.49

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Solution

The fourth proportional to 2,031.55, 3,047.66 and 644.49 is: 966.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,031.55 : 3,047.66 = 644.49 : x
  2. Step 2: Convert to fraction form
    2,031.55/3,047.66 = 644.49/x
  3. Step 3: Cross multiply
    2,031.55x = 3,047.66 × 644.49
  4. Step 4: Simplify right side
    2,031.55x = 1,964,185.59
  5. Step 5: Solve for x
    x = 1,964,185.59/2,031.55
  6. Step 6: Final answer
    x = 966.84

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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.