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Finding the Fourth Proportional to 335.51, 502.56 and 172.84

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Solution

The fourth proportional to 335.51, 502.56 and 172.84 is: 258.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.51 : 502.56 = 172.84 : x
  2. Step 2: Convert to fraction form
    335.51/502.56 = 172.84/x
  3. Step 3: Cross multiply
    335.51x = 502.56 × 172.84
  4. Step 4: Simplify right side
    335.51x = 86,862.47
  5. Step 5: Solve for x
    x = 86,862.47/335.51
  6. Step 6: Final answer
    x = 258.90

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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.