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Finding the Fourth Proportional to 684.63, 944.97 and 551.79

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Solution

The fourth proportional to 684.63, 944.97 and 551.79 is: 761.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.63 : 944.97 = 551.79 : x
  2. Step 2: Convert to fraction form
    684.63/944.97 = 551.79/x
  3. Step 3: Cross multiply
    684.63x = 944.97 × 551.79
  4. Step 4: Simplify right side
    684.63x = 521,425.00
  5. Step 5: Solve for x
    x = 521,425.00/684.63
  6. Step 6: Final answer
    x = 761.62

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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.