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Finding the Fourth Proportional to 388.34, 579.46 and 322.76

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Solution

The fourth proportional to 388.34, 579.46 and 322.76 is: 481.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.34 : 579.46 = 322.76 : x
  2. Step 2: Convert to fraction form
    388.34/579.46 = 322.76/x
  3. Step 3: Cross multiply
    388.34x = 579.46 × 322.76
  4. Step 4: Simplify right side
    388.34x = 187,026.51
  5. Step 5: Solve for x
    x = 187,026.51/388.34
  6. Step 6: Final answer
    x = 481.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.