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Finding the Fourth Proportional to 585.63, 807.71 and 399.33

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Solution

The fourth proportional to 585.63, 807.71 and 399.33 is: 550.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.63 : 807.71 = 399.33 : x
  2. Step 2: Convert to fraction form
    585.63/807.71 = 399.33/x
  3. Step 3: Cross multiply
    585.63x = 807.71 × 399.33
  4. Step 4: Simplify right side
    585.63x = 322,540.84
  5. Step 5: Solve for x
    x = 322,540.84/585.63
  6. Step 6: Final answer
    x = 550.76

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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.