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Finding the Fourth Proportional to 505.19, 756.91 and 245.31

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Solution

The fourth proportional to 505.19, 756.91 and 245.31 is: 367.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.19 : 756.91 = 245.31 : x
  2. Step 2: Convert to fraction form
    505.19/756.91 = 245.31/x
  3. Step 3: Cross multiply
    505.19x = 756.91 × 245.31
  4. Step 4: Simplify right side
    505.19x = 185,677.59
  5. Step 5: Solve for x
    x = 185,677.59/505.19
  6. Step 6: Final answer
    x = 367.54

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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.