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Finding the Fourth Proportional to 450.05, 621.06 and 275.45

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Solution

The fourth proportional to 450.05, 621.06 and 275.45 is: 380.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.05 : 621.06 = 275.45 : x
  2. Step 2: Convert to fraction form
    450.05/621.06 = 275.45/x
  3. Step 3: Cross multiply
    450.05x = 621.06 × 275.45
  4. Step 4: Simplify right side
    450.05x = 171,070.98
  5. Step 5: Solve for x
    x = 171,070.98/450.05
  6. Step 6: Final answer
    x = 380.12

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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.