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Finding the Fourth Proportional to 855.46, 1,180.50 and 540.89

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Solution

The fourth proportional to 855.46, 1,180.50 and 540.89 is: 746.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.46 : 1,180.50 = 540.89 : x
  2. Step 2: Convert to fraction form
    855.46/1,180.50 = 540.89/x
  3. Step 3: Cross multiply
    855.46x = 1,180.50 × 540.89
  4. Step 4: Simplify right side
    855.46x = 638,520.65
  5. Step 5: Solve for x
    x = 638,520.65/855.46
  6. Step 6: Final answer
    x = 746.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.