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Finding the Fourth Proportional to 449.77, 621.21 and 360.36

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Solution

The fourth proportional to 449.77, 621.21 and 360.36 is: 497.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.77 : 621.21 = 360.36 : x
  2. Step 2: Convert to fraction form
    449.77/621.21 = 360.36/x
  3. Step 3: Cross multiply
    449.77x = 621.21 × 360.36
  4. Step 4: Simplify right side
    449.77x = 223,859.24
  5. Step 5: Solve for x
    x = 223,859.24/449.77
  6. Step 6: Final answer
    x = 497.72

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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.