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Finding the Fourth Proportional to 663.11, 915.51 and 453.63

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Solution

The fourth proportional to 663.11, 915.51 and 453.63 is: 626.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.11 : 915.51 = 453.63 : x
  2. Step 2: Convert to fraction form
    663.11/915.51 = 453.63/x
  3. Step 3: Cross multiply
    663.11x = 915.51 × 453.63
  4. Step 4: Simplify right side
    663.11x = 415,302.80
  5. Step 5: Solve for x
    x = 415,302.80/663.11
  6. Step 6: Final answer
    x = 626.30

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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.