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Finding the Fourth Proportional to 563.31, 846.90 and 455.85

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Solution

The fourth proportional to 563.31, 846.90 and 455.85 is: 685.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.31 : 846.90 = 455.85 : x
  2. Step 2: Convert to fraction form
    563.31/846.90 = 455.85/x
  3. Step 3: Cross multiply
    563.31x = 846.90 × 455.85
  4. Step 4: Simplify right side
    563.31x = 386,059.37
  5. Step 5: Solve for x
    x = 386,059.37/563.31
  6. Step 6: Final answer
    x = 685.34

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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.