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Finding the Fourth Proportional to 790.87, 1,185.99 and 352.12

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Solution

The fourth proportional to 790.87, 1,185.99 and 352.12 is: 528.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.87 : 1,185.99 = 352.12 : x
  2. Step 2: Convert to fraction form
    790.87/1,185.99 = 352.12/x
  3. Step 3: Cross multiply
    790.87x = 1,185.99 × 352.12
  4. Step 4: Simplify right side
    790.87x = 417,610.80
  5. Step 5: Solve for x
    x = 417,610.80/790.87
  6. Step 6: Final answer
    x = 528.04

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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.