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Finding the Fourth Proportional to 450.29, 621.45 and 275.53

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Solution

The fourth proportional to 450.29, 621.45 and 275.53 is: 380.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.29 : 621.45 = 275.53 : x
  2. Step 2: Convert to fraction form
    450.29/621.45 = 275.53/x
  3. Step 3: Cross multiply
    450.29x = 621.45 × 275.53
  4. Step 4: Simplify right side
    450.29x = 171,228.12
  5. Step 5: Solve for x
    x = 171,228.12/450.29
  6. Step 6: Final answer
    x = 380.26

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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.