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Finding the Fourth Proportional to 303.91, 456.47 and 260.56

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Solution

The fourth proportional to 303.91, 456.47 and 260.56 is: 391.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.91 : 456.47 = 260.56 : x
  2. Step 2: Convert to fraction form
    303.91/456.47 = 260.56/x
  3. Step 3: Cross multiply
    303.91x = 456.47 × 260.56
  4. Step 4: Simplify right side
    303.91x = 118,936.52
  5. Step 5: Solve for x
    x = 118,936.52/303.91
  6. Step 6: Final answer
    x = 391.35

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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.