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Finding the Fourth Proportional to 509.59, 763.26 and 393.19

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Solution

The fourth proportional to 509.59, 763.26 and 393.19 is: 588.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.59 : 763.26 = 393.19 : x
  2. Step 2: Convert to fraction form
    509.59/763.26 = 393.19/x
  3. Step 3: Cross multiply
    509.59x = 763.26 × 393.19
  4. Step 4: Simplify right side
    509.59x = 300,102.82
  5. Step 5: Solve for x
    x = 300,102.82/509.59
  6. Step 6: Final answer
    x = 588.91

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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.