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Finding the Fourth Proportional to 568.32, 783.96 and 391.26

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Solution

The fourth proportional to 568.32, 783.96 and 391.26 is: 539.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.32 : 783.96 = 391.26 : x
  2. Step 2: Convert to fraction form
    568.32/783.96 = 391.26/x
  3. Step 3: Cross multiply
    568.32x = 783.96 × 391.26
  4. Step 4: Simplify right side
    568.32x = 306,732.19
  5. Step 5: Solve for x
    x = 306,732.19/568.32
  6. Step 6: Final answer
    x = 539.72

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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.