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Finding the Fourth Proportional to 568.69, 784.39 and 428.37

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Solution

The fourth proportional to 568.69, 784.39 and 428.37 is: 590.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.69 : 784.39 = 428.37 : x
  2. Step 2: Convert to fraction form
    568.69/784.39 = 428.37/x
  3. Step 3: Cross multiply
    568.69x = 784.39 × 428.37
  4. Step 4: Simplify right side
    568.69x = 336,009.14
  5. Step 5: Solve for x
    x = 336,009.14/568.69
  6. Step 6: Final answer
    x = 590.85

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Double scale
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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.