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Finding the Fourth Proportional to 463.63, 639.53 and 289.03

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Solution

The fourth proportional to 463.63, 639.53 and 289.03 is: 398.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.63 : 639.53 = 289.03 : x
  2. Step 2: Convert to fraction form
    463.63/639.53 = 289.03/x
  3. Step 3: Cross multiply
    463.63x = 639.53 × 289.03
  4. Step 4: Simplify right side
    463.63x = 184,840.16
  5. Step 5: Solve for x
    x = 184,840.16/463.63
  6. Step 6: Final answer
    x = 398.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.