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Finding the Fourth Proportional to 391.08, 536.71 and 354.16

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Solution

The fourth proportional to 391.08, 536.71 and 354.16 is: 486.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.08 : 536.71 = 354.16 : x
  2. Step 2: Convert to fraction form
    391.08/536.71 = 354.16/x
  3. Step 3: Cross multiply
    391.08x = 536.71 × 354.16
  4. Step 4: Simplify right side
    391.08x = 190,081.21
  5. Step 5: Solve for x
    x = 190,081.21/391.08
  6. Step 6: Final answer
    x = 486.04

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.