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Finding the Fourth Proportional to 302.36, 450.93 and 257

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Solution

The fourth proportional to 302.36, 450.93 and 257 is: 383.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.36 : 450.93 = 257 : x
  2. Step 2: Convert to fraction form
    302.36/450.93 = 257/x
  3. Step 3: Cross multiply
    302.36x = 450.93 × 257
  4. Step 4: Simplify right side
    302.36x = 115,887.73
  5. Step 5: Solve for x
    x = 115,887.73/302.36
  6. Step 6: Final answer
    x = 383.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.