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Finding the Fourth Proportional to 453.60, 626.08 and 257.12

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Solution

The fourth proportional to 453.60, 626.08 and 257.12 is: 354.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.60 : 626.08 = 257.12 : x
  2. Step 2: Convert to fraction form
    453.60/626.08 = 257.12/x
  3. Step 3: Cross multiply
    453.60x = 626.08 × 257.12
  4. Step 4: Simplify right side
    453.60x = 160,977.69
  5. Step 5: Solve for x
    x = 160,977.69/453.60
  6. Step 6: Final answer
    x = 354.89

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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.