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Finding the Fourth Proportional to 2,031.90, 3,048.09 and 644.75

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Solution

The fourth proportional to 2,031.90, 3,048.09 and 644.75 is: 967.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,031.90 : 3,048.09 = 644.75 : x
  2. Step 2: Convert to fraction form
    2,031.90/3,048.09 = 644.75/x
  3. Step 3: Cross multiply
    2,031.90x = 3,048.09 × 644.75
  4. Step 4: Simplify right side
    2,031.90x = 1,965,250.05
  5. Step 5: Solve for x
    x = 1,965,250.05/2,031.90
  6. Step 6: Final answer
    x = 967.20

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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.