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Finding the Fourth Proportional to 451.08, 621.93 and 380.88

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Solution

The fourth proportional to 451.08, 621.93 and 380.88 is: 525.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.08 : 621.93 = 380.88 : x
  2. Step 2: Convert to fraction form
    451.08/621.93 = 380.88/x
  3. Step 3: Cross multiply
    451.08x = 621.93 × 380.88
  4. Step 4: Simplify right side
    451.08x = 236,880.70
  5. Step 5: Solve for x
    x = 236,880.70/451.08
  6. Step 6: Final answer
    x = 525.14

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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.