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Finding the Fourth Proportional to 2,031.06, 3,046.61 and 644.40

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Solution

The fourth proportional to 2,031.06, 3,046.61 and 644.40 is: 966.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,031.06 : 3,046.61 = 644.40 : x
  2. Step 2: Convert to fraction form
    2,031.06/3,046.61 = 644.40/x
  3. Step 3: Cross multiply
    2,031.06x = 3,046.61 × 644.40
  4. Step 4: Simplify right side
    2,031.06x = 1,963,232.26
  5. Step 5: Solve for x
    x = 1,963,232.26/2,031.06
  6. Step 6: Final answer
    x = 966.60

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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.