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Finding the Fourth Proportional to 509.65, 703.04 and 385.09

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Solution

The fourth proportional to 509.65, 703.04 and 385.09 is: 531.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.65 : 703.04 = 385.09 : x
  2. Step 2: Convert to fraction form
    509.65/703.04 = 385.09/x
  3. Step 3: Cross multiply
    509.65x = 703.04 × 385.09
  4. Step 4: Simplify right side
    509.65x = 270,734.05
  5. Step 5: Solve for x
    x = 270,734.05/509.65
  6. Step 6: Final answer
    x = 531.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.