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Finding the Fourth Proportional to 258.08, 357.56 and 253.20

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Solution

The fourth proportional to 258.08, 357.56 and 253.20 is: 350.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.08 : 357.56 = 253.20 : x
  2. Step 2: Convert to fraction form
    258.08/357.56 = 253.20/x
  3. Step 3: Cross multiply
    258.08x = 357.56 × 253.20
  4. Step 4: Simplify right side
    258.08x = 90,534.19
  5. Step 5: Solve for x
    x = 90,534.19/258.08
  6. Step 6: Final answer
    x = 350.80

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.