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Finding the Fourth Proportional to 455.17, 626.69 and 396.93

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Solution

The fourth proportional to 455.17, 626.69 and 396.93 is: 546.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.17 : 626.69 = 396.93 : x
  2. Step 2: Convert to fraction form
    455.17/626.69 = 396.93/x
  3. Step 3: Cross multiply
    455.17x = 626.69 × 396.93
  4. Step 4: Simplify right side
    455.17x = 248,750.08
  5. Step 5: Solve for x
    x = 248,750.08/455.17
  6. Step 6: Final answer
    x = 546.50

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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.