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Finding the Fourth Proportional to 453.65, 627.66 and 395.55

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Solution

The fourth proportional to 453.65, 627.66 and 395.55 is: 547.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.65 : 627.66 = 395.55 : x
  2. Step 2: Convert to fraction form
    453.65/627.66 = 395.55/x
  3. Step 3: Cross multiply
    453.65x = 627.66 × 395.55
  4. Step 4: Simplify right side
    453.65x = 248,270.91
  5. Step 5: Solve for x
    x = 248,270.91/453.65
  6. Step 6: Final answer
    x = 547.28

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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.