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Finding the Fourth Proportional to 1,872.23, 2,808.33 and 485.57

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Solution

The fourth proportional to 1,872.23, 2,808.33 and 485.57 is: 728.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.23 : 2,808.33 = 485.57 : x
  2. Step 2: Convert to fraction form
    1,872.23/2,808.33 = 485.57/x
  3. Step 3: Cross multiply
    1,872.23x = 2,808.33 × 485.57
  4. Step 4: Simplify right side
    1,872.23x = 1,363,640.80
  5. Step 5: Solve for x
    x = 1,363,640.80/1,872.23
  6. Step 6: Final answer
    x = 728.35

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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.