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Finding the Fourth Proportional to 450.10, 621.81 and 356.55

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Solution

The fourth proportional to 450.10, 621.81 and 356.55 is: 492.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.10 : 621.81 = 356.55 : x
  2. Step 2: Convert to fraction form
    450.10/621.81 = 356.55/x
  3. Step 3: Cross multiply
    450.10x = 621.81 × 356.55
  4. Step 4: Simplify right side
    450.10x = 221,706.36
  5. Step 5: Solve for x
    x = 221,706.36/450.10
  6. Step 6: Final answer
    x = 492.57

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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.