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Finding the Fourth Proportional to 1,877.17, 2,815.06 and 644.23

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Solution

The fourth proportional to 1,877.17, 2,815.06 and 644.23 is: 966.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.17 : 2,815.06 = 644.23 : x
  2. Step 2: Convert to fraction form
    1,877.17/2,815.06 = 644.23/x
  3. Step 3: Cross multiply
    1,877.17x = 2,815.06 × 644.23
  4. Step 4: Simplify right side
    1,877.17x = 1,813,542.88
  5. Step 5: Solve for x
    x = 1,813,542.88/1,877.17
  6. Step 6: Final answer
    x = 966.10

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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.