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Finding the Fourth Proportional to 790.74, 1,185.08 and 546.75

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Solution

The fourth proportional to 790.74, 1,185.08 and 546.75 is: 819.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.74 : 1,185.08 = 546.75 : x
  2. Step 2: Convert to fraction form
    790.74/1,185.08 = 546.75/x
  3. Step 3: Cross multiply
    790.74x = 1,185.08 × 546.75
  4. Step 4: Simplify right side
    790.74x = 647,942.83
  5. Step 5: Solve for x
    x = 647,942.83/790.74
  6. Step 6: Final answer
    x = 819.42

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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.