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Finding the Fourth Proportional to 566.39, 781.61 and 317.71

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Solution

The fourth proportional to 566.39, 781.61 and 317.71 is: 438.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.39 : 781.61 = 317.71 : x
  2. Step 2: Convert to fraction form
    566.39/781.61 = 317.71/x
  3. Step 3: Cross multiply
    566.39x = 781.61 × 317.71
  4. Step 4: Simplify right side
    566.39x = 248,323.21
  5. Step 5: Solve for x
    x = 248,323.21/566.39
  6. Step 6: Final answer
    x = 438.43

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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.