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Finding the Fourth Proportional to 639.48, 880.62 and 546.03

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Solution

The fourth proportional to 639.48, 880.62 and 546.03 is: 751.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.48 : 880.62 = 546.03 : x
  2. Step 2: Convert to fraction form
    639.48/880.62 = 546.03/x
  3. Step 3: Cross multiply
    639.48x = 880.62 × 546.03
  4. Step 4: Simplify right side
    639.48x = 480,844.94
  5. Step 5: Solve for x
    x = 480,844.94/639.48
  6. Step 6: Final answer
    x = 751.93

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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.