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Finding the Fourth Proportional to 505.68, 758.64 and 249.12

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Solution

The fourth proportional to 505.68, 758.64 and 249.12 is: 373.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.68 : 758.64 = 249.12 : x
  2. Step 2: Convert to fraction form
    505.68/758.64 = 249.12/x
  3. Step 3: Cross multiply
    505.68x = 758.64 × 249.12
  4. Step 4: Simplify right side
    505.68x = 188,992.40
  5. Step 5: Solve for x
    x = 188,992.40/505.68
  6. Step 6: Final answer
    x = 373.74

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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.