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Finding the Fourth Proportional to 566.05, 781.17 and 317.39

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Solution

The fourth proportional to 566.05, 781.17 and 317.39 is: 438.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.05 : 781.17 = 317.39 : x
  2. Step 2: Convert to fraction form
    566.05/781.17 = 317.39/x
  3. Step 3: Cross multiply
    566.05x = 781.17 × 317.39
  4. Step 4: Simplify right side
    566.05x = 247,935.55
  5. Step 5: Solve for x
    x = 247,935.55/566.05
  6. Step 6: Final answer
    x = 438.01

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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.