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Finding the Fourth Proportional to 454.24, 626.64 and 389.44

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Solution

The fourth proportional to 454.24, 626.64 and 389.44 is: 537.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.24 : 626.64 = 389.44 : x
  2. Step 2: Convert to fraction form
    454.24/626.64 = 389.44/x
  3. Step 3: Cross multiply
    454.24x = 626.64 × 389.44
  4. Step 4: Simplify right side
    454.24x = 244,038.68
  5. Step 5: Solve for x
    x = 244,038.68/454.24
  6. Step 6: Final answer
    x = 537.25

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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.