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Finding the Fourth Proportional to 450.76, 621.90 and 392.44

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Solution

The fourth proportional to 450.76, 621.90 and 392.44 is: 541.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.76 : 621.90 = 392.44 : x
  2. Step 2: Convert to fraction form
    450.76/621.90 = 392.44/x
  3. Step 3: Cross multiply
    450.76x = 621.90 × 392.44
  4. Step 4: Simplify right side
    450.76x = 244,058.44
  5. Step 5: Solve for x
    x = 244,058.44/450.76
  6. Step 6: Final answer
    x = 541.44

Related Problems

Find fourth proportional to 225.38, 310.95 and 196.22
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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.