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Finding the Fourth Proportional to 450.21, 621.56 and 403.50

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Solution

The fourth proportional to 450.21, 621.56 and 403.50 is: 557.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.21 : 621.56 = 403.50 : x
  2. Step 2: Convert to fraction form
    450.21/621.56 = 403.50/x
  3. Step 3: Cross multiply
    450.21x = 621.56 × 403.50
  4. Step 4: Simplify right side
    450.21x = 250,799.46
  5. Step 5: Solve for x
    x = 250,799.46/450.21
  6. Step 6: Final answer
    x = 557.07

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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.