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Finding the Fourth Proportional to 505.98, 758.16 and 486.99

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Solution

The fourth proportional to 505.98, 758.16 and 486.99 is: 729.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.98 : 758.16 = 486.99 : x
  2. Step 2: Convert to fraction form
    505.98/758.16 = 486.99/x
  3. Step 3: Cross multiply
    505.98x = 758.16 × 486.99
  4. Step 4: Simplify right side
    505.98x = 369,216.34
  5. Step 5: Solve for x
    x = 369,216.34/505.98
  6. Step 6: Final answer
    x = 729.71

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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.