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Finding the Fourth Proportional to 548.64, 756.16 and 455.20

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Solution

The fourth proportional to 548.64, 756.16 and 455.20 is: 627.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.64 : 756.16 = 455.20 : x
  2. Step 2: Convert to fraction form
    548.64/756.16 = 455.20/x
  3. Step 3: Cross multiply
    548.64x = 756.16 × 455.20
  4. Step 4: Simplify right side
    548.64x = 344,204.03
  5. Step 5: Solve for x
    x = 344,204.03/548.64
  6. Step 6: Final answer
    x = 627.38

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1.5x scale

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.