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Finding the Fourth Proportional to 453.28, 625.56 and 256.80

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Solution

The fourth proportional to 453.28, 625.56 and 256.80 is: 354.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.28 : 625.56 = 256.80 : x
  2. Step 2: Convert to fraction form
    453.28/625.56 = 256.80/x
  3. Step 3: Cross multiply
    453.28x = 625.56 × 256.80
  4. Step 4: Simplify right side
    453.28x = 160,643.81
  5. Step 5: Solve for x
    x = 160,643.81/453.28
  6. Step 6: Final answer
    x = 354.40

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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.