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Finding the Fourth Proportional to 453.04, 621.44 and 428.20

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Solution

The fourth proportional to 453.04, 621.44 and 428.20 is: 587.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.04 : 621.44 = 428.20 : x
  2. Step 2: Convert to fraction form
    453.04/621.44 = 428.20/x
  3. Step 3: Cross multiply
    453.04x = 621.44 × 428.20
  4. Step 4: Simplify right side
    453.04x = 266,100.61
  5. Step 5: Solve for x
    x = 266,100.61/453.04
  6. Step 6: Final answer
    x = 587.37

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.