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Finding the Fourth Proportional to 551.40, 827.10 and 342.60

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Solution

The fourth proportional to 551.40, 827.10 and 342.60 is: 513.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.40 : 827.10 = 342.60 : x
  2. Step 2: Convert to fraction form
    551.40/827.10 = 342.60/x
  3. Step 3: Cross multiply
    551.40x = 827.10 × 342.60
  4. Step 4: Simplify right side
    551.40x = 283,364.46
  5. Step 5: Solve for x
    x = 283,364.46/551.40
  6. Step 6: Final answer
    x = 513.90

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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.