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Finding the Fourth Proportional to 1,877.15, 2,815.11 and 644.54

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Solution

The fourth proportional to 1,877.15, 2,815.11 and 644.54 is: 966.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.15 : 2,815.11 = 644.54 : x
  2. Step 2: Convert to fraction form
    1,877.15/2,815.11 = 644.54/x
  3. Step 3: Cross multiply
    1,877.15x = 2,815.11 × 644.54
  4. Step 4: Simplify right side
    1,877.15x = 1,814,436.92
  5. Step 5: Solve for x
    x = 1,814,436.92/1,877.15
  6. Step 6: Final answer
    x = 966.59

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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.