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Finding the Fourth Proportional to 568.56, 781.85 and 455.11

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Solution

The fourth proportional to 568.56, 781.85 and 455.11 is: 625.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.56 : 781.85 = 455.11 : x
  2. Step 2: Convert to fraction form
    568.56/781.85 = 455.11/x
  3. Step 3: Cross multiply
    568.56x = 781.85 × 455.11
  4. Step 4: Simplify right side
    568.56x = 355,825.22
  5. Step 5: Solve for x
    x = 355,825.22/568.56
  6. Step 6: Final answer
    x = 625.84

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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.