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Finding the Fourth Proportional to 301.55, 451.94 and 257.00

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Solution

The fourth proportional to 301.55, 451.94 and 257.00 is: 385.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.55 : 451.94 = 257.00 : x
  2. Step 2: Convert to fraction form
    301.55/451.94 = 257.00/x
  3. Step 3: Cross multiply
    301.55x = 451.94 × 257.00
  4. Step 4: Simplify right side
    301.55x = 116,145.76
  5. Step 5: Solve for x
    x = 116,145.76/301.55
  6. Step 6: Final answer
    x = 385.17

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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.