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Finding the Fourth Proportional to 505.08, 696.84 and 328.08

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Solution

The fourth proportional to 505.08, 696.84 and 328.08 is: 452.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.08 : 696.84 = 328.08 : x
  2. Step 2: Convert to fraction form
    505.08/696.84 = 328.08/x
  3. Step 3: Cross multiply
    505.08x = 696.84 × 328.08
  4. Step 4: Simplify right side
    505.08x = 228,619.27
  5. Step 5: Solve for x
    x = 228,619.27/505.08
  6. Step 6: Final answer
    x = 452.64

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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.