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Finding the Fourth Proportional to 648.64, 895.49 and 451.81

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Solution

The fourth proportional to 648.64, 895.49 and 451.81 is: 623.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.64 : 895.49 = 451.81 : x
  2. Step 2: Convert to fraction form
    648.64/895.49 = 451.81/x
  3. Step 3: Cross multiply
    648.64x = 895.49 × 451.81
  4. Step 4: Simplify right side
    648.64x = 404,591.34
  5. Step 5: Solve for x
    x = 404,591.34/648.64
  6. Step 6: Final answer
    x = 623.75

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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.