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Finding the Fourth Proportional to 520.04, 780.46 and 276.36

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Solution

The fourth proportional to 520.04, 780.46 and 276.36 is: 414.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.04 : 780.46 = 276.36 : x
  2. Step 2: Convert to fraction form
    520.04/780.46 = 276.36/x
  3. Step 3: Cross multiply
    520.04x = 780.46 × 276.36
  4. Step 4: Simplify right side
    520.04x = 215,687.93
  5. Step 5: Solve for x
    x = 215,687.93/520.04
  6. Step 6: Final answer
    x = 414.75

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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.