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Finding the Fourth Proportional to 509.41, 759.11 and 478.63

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Solution

The fourth proportional to 509.41, 759.11 and 478.63 is: 713.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.41 : 759.11 = 478.63 : x
  2. Step 2: Convert to fraction form
    509.41/759.11 = 478.63/x
  3. Step 3: Cross multiply
    509.41x = 759.11 × 478.63
  4. Step 4: Simplify right side
    509.41x = 363,332.82
  5. Step 5: Solve for x
    x = 363,332.82/509.41
  6. Step 6: Final answer
    x = 713.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.