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Finding the Fourth Proportional to 520.14, 779.80 and 260.01

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Solution

The fourth proportional to 520.14, 779.80 and 260.01 is: 389.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.14 : 779.80 = 260.01 : x
  2. Step 2: Convert to fraction form
    520.14/779.80 = 260.01/x
  3. Step 3: Cross multiply
    520.14x = 779.80 × 260.01
  4. Step 4: Simplify right side
    520.14x = 202,758.40
  5. Step 5: Solve for x
    x = 202,758.40/520.14
  6. Step 6: Final answer
    x = 389.82

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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.