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Finding the Fourth Proportional to 386.34, 576.02 and 374.28

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Solution

The fourth proportional to 386.34, 576.02 and 374.28 is: 558.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.34 : 576.02 = 374.28 : x
  2. Step 2: Convert to fraction form
    386.34/576.02 = 374.28/x
  3. Step 3: Cross multiply
    386.34x = 576.02 × 374.28
  4. Step 4: Simplify right side
    386.34x = 215,590.89
  5. Step 5: Solve for x
    x = 215,590.89/386.34
  6. Step 6: Final answer
    x = 558.03

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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.