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Finding the Fourth Proportional to 451.17, 621.23 and 395.60

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Solution

The fourth proportional to 451.17, 621.23 and 395.60 is: 544.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.17 : 621.23 = 395.60 : x
  2. Step 2: Convert to fraction form
    451.17/621.23 = 395.60/x
  3. Step 3: Cross multiply
    451.17x = 621.23 × 395.60
  4. Step 4: Simplify right side
    451.17x = 245,753.50
  5. Step 5: Solve for x
    x = 245,753.50/451.17
  6. Step 6: Final answer
    x = 544.70

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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.