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Finding the Fourth Proportional to 505.05, 756.90 and 260.97

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Solution

The fourth proportional to 505.05, 756.90 and 260.97 is: 391.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.05 : 756.90 = 260.97 : x
  2. Step 2: Convert to fraction form
    505.05/756.90 = 260.97/x
  3. Step 3: Cross multiply
    505.05x = 756.90 × 260.97
  4. Step 4: Simplify right side
    505.05x = 197,528.19
  5. Step 5: Solve for x
    x = 197,528.19/505.05
  6. Step 6: Final answer
    x = 391.11

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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.