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Finding the Fourth Proportional to 387.04, 579.12 and 304.96

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Solution

The fourth proportional to 387.04, 579.12 and 304.96 is: 456.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.04 : 579.12 = 304.96 : x
  2. Step 2: Convert to fraction form
    387.04/579.12 = 304.96/x
  3. Step 3: Cross multiply
    387.04x = 579.12 × 304.96
  4. Step 4: Simplify right side
    387.04x = 176,608.44
  5. Step 5: Solve for x
    x = 176,608.44/387.04
  6. Step 6: Final answer
    x = 456.31

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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.