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Finding the Fourth Proportional to 520.11, 780.29 and 260.27

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Solution

The fourth proportional to 520.11, 780.29 and 260.27 is: 390.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.11 : 780.29 = 260.27 : x
  2. Step 2: Convert to fraction form
    520.11/780.29 = 260.27/x
  3. Step 3: Cross multiply
    520.11x = 780.29 × 260.27
  4. Step 4: Simplify right side
    520.11x = 203,080.88
  5. Step 5: Solve for x
    x = 203,080.88/520.11
  6. Step 6: Final answer
    x = 390.46

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Similar ratio
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1.5x scale

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.