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Finding the Fourth Proportional to 304.95, 456.34 and 287.41

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Solution

The fourth proportional to 304.95, 456.34 and 287.41 is: 430.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.95 : 456.34 = 287.41 : x
  2. Step 2: Convert to fraction form
    304.95/456.34 = 287.41/x
  3. Step 3: Cross multiply
    304.95x = 456.34 × 287.41
  4. Step 4: Simplify right side
    304.95x = 131,156.68
  5. Step 5: Solve for x
    x = 131,156.68/304.95
  6. Step 6: Final answer
    x = 430.09

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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.