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Finding the Fourth Proportional to 466.63, 643.72 and 280.03

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Solution

The fourth proportional to 466.63, 643.72 and 280.03 is: 386.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.63 : 643.72 = 280.03 : x
  2. Step 2: Convert to fraction form
    466.63/643.72 = 280.03/x
  3. Step 3: Cross multiply
    466.63x = 643.72 × 280.03
  4. Step 4: Simplify right side
    466.63x = 180,260.91
  5. Step 5: Solve for x
    x = 180,260.91/466.63
  6. Step 6: Final answer
    x = 386.30

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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.