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Finding the Fourth Proportional to 520.40, 779.92 and 246.12

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Solution

The fourth proportional to 520.40, 779.92 and 246.12 is: 368.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.40 : 779.92 = 246.12 : x
  2. Step 2: Convert to fraction form
    520.40/779.92 = 246.12/x
  3. Step 3: Cross multiply
    520.40x = 779.92 × 246.12
  4. Step 4: Simplify right side
    520.40x = 191,953.91
  5. Step 5: Solve for x
    x = 191,953.91/520.40
  6. Step 6: Final answer
    x = 368.86

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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.