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Finding the Fourth Proportional to 2,031.56, 3,047.36 and 644.90

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Solution

The fourth proportional to 2,031.56, 3,047.36 and 644.90 is: 967.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,031.56 : 3,047.36 = 644.90 : x
  2. Step 2: Convert to fraction form
    2,031.56/3,047.36 = 644.90/x
  3. Step 3: Cross multiply
    2,031.56x = 3,047.36 × 644.90
  4. Step 4: Simplify right side
    2,031.56x = 1,965,239.24
  5. Step 5: Solve for x
    x = 1,965,239.24/2,031.56
  6. Step 6: Final answer
    x = 967.35

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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.