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Finding the Fourth Proportional to 414.89, 621.56 and 297.51

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Solution

The fourth proportional to 414.89, 621.56 and 297.51 is: 445.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.89 : 621.56 = 297.51 : x
  2. Step 2: Convert to fraction form
    414.89/621.56 = 297.51/x
  3. Step 3: Cross multiply
    414.89x = 621.56 × 297.51
  4. Step 4: Simplify right side
    414.89x = 184,917.06
  5. Step 5: Solve for x
    x = 184,917.06/414.89
  6. Step 6: Final answer
    x = 445.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.