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Finding the Fourth Proportional to 563.65, 844.10 and 389.85

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Solution

The fourth proportional to 563.65, 844.10 and 389.85 is: 583.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.65 : 844.10 = 389.85 : x
  2. Step 2: Convert to fraction form
    563.65/844.10 = 389.85/x
  3. Step 3: Cross multiply
    563.65x = 844.10 × 389.85
  4. Step 4: Simplify right side
    563.65x = 329,072.39
  5. Step 5: Solve for x
    x = 329,072.39/563.65
  6. Step 6: Final answer
    x = 583.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.