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Finding the Fourth Proportional to 387.48, 576.60 and 374.25

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Solution

The fourth proportional to 387.48, 576.60 and 374.25 is: 556.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.48 : 576.60 = 374.25 : x
  2. Step 2: Convert to fraction form
    387.48/576.60 = 374.25/x
  3. Step 3: Cross multiply
    387.48x = 576.60 × 374.25
  4. Step 4: Simplify right side
    387.48x = 215,792.55
  5. Step 5: Solve for x
    x = 215,792.55/387.48
  6. Step 6: Final answer
    x = 556.91

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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.