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Finding the Fourth Proportional to 663.05, 915.42 and 453.57

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Solution

The fourth proportional to 663.05, 915.42 and 453.57 is: 626.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.05 : 915.42 = 453.57 : x
  2. Step 2: Convert to fraction form
    663.05/915.42 = 453.57/x
  3. Step 3: Cross multiply
    663.05x = 915.42 × 453.57
  4. Step 4: Simplify right side
    663.05x = 415,208.75
  5. Step 5: Solve for x
    x = 415,208.75/663.05
  6. Step 6: Final answer
    x = 626.22

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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.