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Finding the Fourth Proportional to 304.13, 456.05 and 139.59

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Solution

The fourth proportional to 304.13, 456.05 and 139.59 is: 209.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.13 : 456.05 = 139.59 : x
  2. Step 2: Convert to fraction form
    304.13/456.05 = 139.59/x
  3. Step 3: Cross multiply
    304.13x = 456.05 × 139.59
  4. Step 4: Simplify right side
    304.13x = 63,660.37
  5. Step 5: Solve for x
    x = 63,660.37/304.13
  6. Step 6: Final answer
    x = 209.32

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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.