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Finding the Fourth Proportional to 302.31, 416.70 and 256.14

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Solution

The fourth proportional to 302.31, 416.70 and 256.14 is: 353.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.31 : 416.70 = 256.14 : x
  2. Step 2: Convert to fraction form
    302.31/416.70 = 256.14/x
  3. Step 3: Cross multiply
    302.31x = 416.70 × 256.14
  4. Step 4: Simplify right side
    302.31x = 106,733.54
  5. Step 5: Solve for x
    x = 106,733.54/302.31
  6. Step 6: Final answer
    x = 353.06

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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.