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Finding the Fourth Proportional to 563.39, 845.06 and 389.55

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Solution

The fourth proportional to 563.39, 845.06 and 389.55 is: 584.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.39 : 845.06 = 389.55 : x
  2. Step 2: Convert to fraction form
    563.39/845.06 = 389.55/x
  3. Step 3: Cross multiply
    563.39x = 845.06 × 389.55
  4. Step 4: Simplify right side
    563.39x = 329,193.12
  5. Step 5: Solve for x
    x = 329,193.12/563.39
  6. Step 6: Final answer
    x = 584.31

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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.