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Finding the Fourth Proportional to 451.70, 623.39 and 274.71

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Solution

The fourth proportional to 451.70, 623.39 and 274.71 is: 379.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.70 : 623.39 = 274.71 : x
  2. Step 2: Convert to fraction form
    451.70/623.39 = 274.71/x
  3. Step 3: Cross multiply
    451.70x = 623.39 × 274.71
  4. Step 4: Simplify right side
    451.70x = 171,251.47
  5. Step 5: Solve for x
    x = 171,251.47/451.70
  6. Step 6: Final answer
    x = 379.13

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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.