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Finding the Fourth Proportional to 688, 950.16 and 480.64

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Solution

The fourth proportional to 688, 950.16 and 480.64 is: 663.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    688 : 950.16 = 480.64 : x
  2. Step 2: Convert to fraction form
    688/950.16 = 480.64/x
  3. Step 3: Cross multiply
    688x = 950.16 × 480.64
  4. Step 4: Simplify right side
    688x = 456,684.90
  5. Step 5: Solve for x
    x = 456,684.90/688
  6. Step 6: Final answer
    x = 663.79

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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.