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Finding the Fourth Proportional to 451.60, 623.32 and 274.58

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Solution

The fourth proportional to 451.60, 623.32 and 274.58 is: 378.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.60 : 623.32 = 274.58 : x
  2. Step 2: Convert to fraction form
    451.60/623.32 = 274.58/x
  3. Step 3: Cross multiply
    451.60x = 623.32 × 274.58
  4. Step 4: Simplify right side
    451.60x = 171,151.21
  5. Step 5: Solve for x
    x = 171,151.21/451.60
  6. Step 6: Final answer
    x = 378.99

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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.