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Finding the Fourth Proportional to 509.99, 764.65 and 304.59

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Solution

The fourth proportional to 509.99, 764.65 and 304.59 is: 456.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.99 : 764.65 = 304.59 : x
  2. Step 2: Convert to fraction form
    509.99/764.65 = 304.59/x
  3. Step 3: Cross multiply
    509.99x = 764.65 × 304.59
  4. Step 4: Simplify right side
    509.99x = 232,903.22
  5. Step 5: Solve for x
    x = 232,903.22/509.99
  6. Step 6: Final answer
    x = 456.68

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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.