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Finding the Fourth Proportional to 568.92, 784.76 and 428.96

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Solution

The fourth proportional to 568.92, 784.76 and 428.96 is: 591.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.92 : 784.76 = 428.96 : x
  2. Step 2: Convert to fraction form
    568.92/784.76 = 428.96/x
  3. Step 3: Cross multiply
    568.92x = 784.76 × 428.96
  4. Step 4: Simplify right side
    568.92x = 336,630.47
  5. Step 5: Solve for x
    x = 336,630.47/568.92
  6. Step 6: Final answer
    x = 591.70

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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.