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Finding the Fourth Proportional to 451.28, 621.94 and 430.60

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Solution

The fourth proportional to 451.28, 621.94 and 430.60 is: 593.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.28 : 621.94 = 430.60 : x
  2. Step 2: Convert to fraction form
    451.28/621.94 = 430.60/x
  3. Step 3: Cross multiply
    451.28x = 621.94 × 430.60
  4. Step 4: Simplify right side
    451.28x = 267,807.36
  5. Step 5: Solve for x
    x = 267,807.36/451.28
  6. Step 6: Final answer
    x = 593.44

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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.