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Finding the Fourth Proportional to 505.80, 756.84 and 418.32

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Solution

The fourth proportional to 505.80, 756.84 and 418.32 is: 625.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.80 : 756.84 = 418.32 : x
  2. Step 2: Convert to fraction form
    505.80/756.84 = 418.32/x
  3. Step 3: Cross multiply
    505.80x = 756.84 × 418.32
  4. Step 4: Simplify right side
    505.80x = 316,601.31
  5. Step 5: Solve for x
    x = 316,601.31/505.80
  6. Step 6: Final answer
    x = 625.94

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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.