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Finding the Fourth Proportional to 451.56, 623.28 and 358.46

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Solution

The fourth proportional to 451.56, 623.28 and 358.46 is: 494.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.56 : 623.28 = 358.46 : x
  2. Step 2: Convert to fraction form
    451.56/623.28 = 358.46/x
  3. Step 3: Cross multiply
    451.56x = 623.28 × 358.46
  4. Step 4: Simplify right side
    451.56x = 223,420.95
  5. Step 5: Solve for x
    x = 223,420.95/451.56
  6. Step 6: Final answer
    x = 494.78

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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.