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Finding the Fourth Proportional to 654.41, 979.86 and 551.45

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Solution

The fourth proportional to 654.41, 979.86 and 551.45 is: 825.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.41 : 979.86 = 551.45 : x
  2. Step 2: Convert to fraction form
    654.41/979.86 = 551.45/x
  3. Step 3: Cross multiply
    654.41x = 979.86 × 551.45
  4. Step 4: Simplify right side
    654.41x = 540,343.80
  5. Step 5: Solve for x
    x = 540,343.80/654.41
  6. Step 6: Final answer
    x = 825.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.