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Finding the Fourth Proportional to 469.85, 644.34 and 464.45

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Solution

The fourth proportional to 469.85, 644.34 and 464.45 is: 636.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.85 : 644.34 = 464.45 : x
  2. Step 2: Convert to fraction form
    469.85/644.34 = 464.45/x
  3. Step 3: Cross multiply
    469.85x = 644.34 × 464.45
  4. Step 4: Simplify right side
    469.85x = 299,260.49
  5. Step 5: Solve for x
    x = 299,260.49/469.85
  6. Step 6: Final answer
    x = 636.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.