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Finding the Fourth Proportional to 425.09, 585.47 and 392.69

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Solution

The fourth proportional to 425.09, 585.47 and 392.69 is: 540.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.09 : 585.47 = 392.69 : x
  2. Step 2: Convert to fraction form
    425.09/585.47 = 392.69/x
  3. Step 3: Cross multiply
    425.09x = 585.47 × 392.69
  4. Step 4: Simplify right side
    425.09x = 229,906.25
  5. Step 5: Solve for x
    x = 229,906.25/425.09
  6. Step 6: Final answer
    x = 540.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.