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Finding the Fourth Proportional to 453.48, 678.44 and 395.30

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Solution

The fourth proportional to 453.48, 678.44 and 395.30 is: 591.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.48 : 678.44 = 395.30 : x
  2. Step 2: Convert to fraction form
    453.48/678.44 = 395.30/x
  3. Step 3: Cross multiply
    453.48x = 678.44 × 395.30
  4. Step 4: Simplify right side
    453.48x = 268,187.33
  5. Step 5: Solve for x
    x = 268,187.33/453.48
  6. Step 6: Final answer
    x = 591.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.