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Finding the Fourth Proportional to 519.72, 779.57 and 245.89

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Solution

The fourth proportional to 519.72, 779.57 and 245.89 is: 368.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.72 : 779.57 = 245.89 : x
  2. Step 2: Convert to fraction form
    519.72/779.57 = 245.89/x
  3. Step 3: Cross multiply
    519.72x = 779.57 × 245.89
  4. Step 4: Simplify right side
    519.72x = 191,686.13
  5. Step 5: Solve for x
    x = 191,686.13/519.72
  6. Step 6: Final answer
    x = 368.83

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.