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Finding the Fourth Proportional to 568.98, 784.98 and 394.56

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Solution

The fourth proportional to 568.98, 784.98 and 394.56 is: 544.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.98 : 784.98 = 394.56 : x
  2. Step 2: Convert to fraction form
    568.98/784.98 = 394.56/x
  3. Step 3: Cross multiply
    568.98x = 784.98 × 394.56
  4. Step 4: Simplify right side
    568.98x = 309,721.71
  5. Step 5: Solve for x
    x = 309,721.71/568.98
  6. Step 6: Final answer
    x = 544.35

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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.