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Finding the Fourth Proportional to 453.48, 626.79 and 400.65

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Solution

The fourth proportional to 453.48, 626.79 and 400.65 is: 553.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.48 : 626.79 = 400.65 : x
  2. Step 2: Convert to fraction form
    453.48/626.79 = 400.65/x
  3. Step 3: Cross multiply
    453.48x = 626.79 × 400.65
  4. Step 4: Simplify right side
    453.48x = 251,123.41
  5. Step 5: Solve for x
    x = 251,123.41/453.48
  6. Step 6: Final answer
    x = 553.77

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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.