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Finding the Fourth Proportional to 568.38, 784.44 and 393.96

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Solution

The fourth proportional to 568.38, 784.44 and 393.96 is: 543.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.38 : 784.44 = 393.96 : x
  2. Step 2: Convert to fraction form
    568.38/784.44 = 393.96/x
  3. Step 3: Cross multiply
    568.38x = 784.44 × 393.96
  4. Step 4: Simplify right side
    568.38x = 309,037.98
  5. Step 5: Solve for x
    x = 309,037.98/568.38
  6. Step 6: Final answer
    x = 543.72

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.