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Finding the Fourth Proportional to 387.62, 578.60 and 336.45

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Solution

The fourth proportional to 387.62, 578.60 and 336.45 is: 502.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.62 : 578.60 = 336.45 : x
  2. Step 2: Convert to fraction form
    387.62/578.60 = 336.45/x
  3. Step 3: Cross multiply
    387.62x = 578.60 × 336.45
  4. Step 4: Simplify right side
    387.62x = 194,668.29
  5. Step 5: Solve for x
    x = 194,668.29/387.62
  6. Step 6: Final answer
    x = 502.22

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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.