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Finding the Fourth Proportional to 579.78, 864.99 and 563.99

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Solution

The fourth proportional to 579.78, 864.99 and 563.99 is: 841.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.78 : 864.99 = 563.99 : x
  2. Step 2: Convert to fraction form
    579.78/864.99 = 563.99/x
  3. Step 3: Cross multiply
    579.78x = 864.99 × 563.99
  4. Step 4: Simplify right side
    579.78x = 487,841.39
  5. Step 5: Solve for x
    x = 487,841.39/579.78
  6. Step 6: Final answer
    x = 841.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.