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Finding the Fourth Proportional to 520.04, 780.10 and 303.64

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Solution

The fourth proportional to 520.04, 780.10 and 303.64 is: 455.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.04 : 780.10 = 303.64 : x
  2. Step 2: Convert to fraction form
    520.04/780.10 = 303.64/x
  3. Step 3: Cross multiply
    520.04x = 780.10 × 303.64
  4. Step 4: Simplify right side
    520.04x = 236,869.56
  5. Step 5: Solve for x
    x = 236,869.56/520.04
  6. Step 6: Final answer
    x = 455.48

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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.