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Finding the Fourth Proportional to 663.16, 914.55 and 450.80

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Solution

The fourth proportional to 663.16, 914.55 and 450.80 is: 621.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.16 : 914.55 = 450.80 : x
  2. Step 2: Convert to fraction form
    663.16/914.55 = 450.80/x
  3. Step 3: Cross multiply
    663.16x = 914.55 × 450.80
  4. Step 4: Simplify right side
    663.16x = 412,275.69
  5. Step 5: Solve for x
    x = 412,275.69/663.16
  6. Step 6: Final answer
    x = 621.68

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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.