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Finding the Fourth Proportional to 1,877.16, 2,815.32 and 644.52

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Solution

The fourth proportional to 1,877.16, 2,815.32 and 644.52 is: 966.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.16 : 2,815.32 = 644.52 : x
  2. Step 2: Convert to fraction form
    1,877.16/2,815.32 = 644.52/x
  3. Step 3: Cross multiply
    1,877.16x = 2,815.32 × 644.52
  4. Step 4: Simplify right side
    1,877.16x = 1,814,530.05
  5. Step 5: Solve for x
    x = 1,814,530.05/1,877.16
  6. Step 6: Final answer
    x = 966.64

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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.