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Finding the Fourth Proportional to 450.28, 621.54 and 395.08

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Solution

The fourth proportional to 450.28, 621.54 and 395.08 is: 545.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.28 : 621.54 = 395.08 : x
  2. Step 2: Convert to fraction form
    450.28/621.54 = 395.08/x
  3. Step 3: Cross multiply
    450.28x = 621.54 × 395.08
  4. Step 4: Simplify right side
    450.28x = 245,558.02
  5. Step 5: Solve for x
    x = 245,558.02/450.28
  6. Step 6: Final answer
    x = 545.35

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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.