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Finding the Fourth Proportional to 509.15, 761.70 and 441.43

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Solution

The fourth proportional to 509.15, 761.70 and 441.43 is: 660.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.15 : 761.70 = 441.43 : x
  2. Step 2: Convert to fraction form
    509.15/761.70 = 441.43/x
  3. Step 3: Cross multiply
    509.15x = 761.70 × 441.43
  4. Step 4: Simplify right side
    509.15x = 336,237.23
  5. Step 5: Solve for x
    x = 336,237.23/509.15
  6. Step 6: Final answer
    x = 660.39

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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.