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Finding the Fourth Proportional to 504.86, 755.55 and 319.68

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Solution

The fourth proportional to 504.86, 755.55 and 319.68 is: 478.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.86 : 755.55 = 319.68 : x
  2. Step 2: Convert to fraction form
    504.86/755.55 = 319.68/x
  3. Step 3: Cross multiply
    504.86x = 755.55 × 319.68
  4. Step 4: Simplify right side
    504.86x = 241,534.22
  5. Step 5: Solve for x
    x = 241,534.22/504.86
  6. Step 6: Final answer
    x = 478.42

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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.