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Finding the Fourth Proportional to 621.45, 931.53 and 297.09

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Solution

The fourth proportional to 621.45, 931.53 and 297.09 is: 445.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.45 : 931.53 = 297.09 : x
  2. Step 2: Convert to fraction form
    621.45/931.53 = 297.09/x
  3. Step 3: Cross multiply
    621.45x = 931.53 × 297.09
  4. Step 4: Simplify right side
    621.45x = 276,748.25
  5. Step 5: Solve for x
    x = 276,748.25/621.45
  6. Step 6: Final answer
    x = 445.33

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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.